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                    <text>Session 9: History and Current Trends of Underwater Archaeology around East Asia
An interview with Session Chair, Akifumi Iwabuchi,
1. Why did you choose to organize this session?
In 2011 Tokyo University of Marine Science and Technology, to which Session 9
organizers belong, organized an independent session by the same title as session 9
(“History and Current Trends of Underwater Archaeology around East Asia”) at the
first Asia-Pacific Regional Conference on Underwater Cultural Heritage in Manila.
At that time, Tokyo University of Marine Science and Technology had the session,
together with the Asian Research Institute of Underwater Archaeology in Fukuoka,
Japan. However, Tokyo University of Marine Science and Technology has decided to
organize one session by itself alone in Hawaii. I am extremely happy to have eleven
presenters at Session 9, not only from Japan, but also from China, Korea, and the U.S.

2. What did you hope to gain from it?
Since the 1950’s, the Mediterranean Sea in Europe has been, in a sense, the centre of
underwater archaeology.

Because of some political reasons, indeed, underwater

archaeology in Asian region has been underdeveloped, but in terms of maritime history,
as we all know, Asian waters are as important as the Mediterranean Sea. Recently
some scholars have named Asian waters between East and Southeast Asia the “Asian
Mediterranean.” In the very near future, presumably, this area also will be another
world-centre of underwater archaeology. I hope that this Session 9 will trigger off the
new era of maritime archaeology in Asia.

3. How does your session fit into the overall theme of the conference?
As far as I understand, this conference treats the management and protection strategies
of underwater cultural heritage, the regional cooperation, and the technical and ethical
issues related to underwater archaeology in the Asia-Pacific region. As we see, papers
and presentations at Session 9 well succeeded in widely covering these themes
concerning East Asia.

�4. What do you hope to see accomplished in your research area (as represented by the
papers in this session) over the next ten or more years?
Because of some political reasons, as I told, underwater archaeology has been
underdeveloped in East Asia. Perhaps even still it is so owing to territorial disputes
over the sea in Asian waters.

On the other hand, however, to study underwater

cultural heritage has no national boundaries. Fortunately in Japan, Tokyo University
of Marine Science and Technology has just become a member university of UNESCO
Underwater Archaeology Unitwin Network. It is the only one member university from
the Asian region.

For example, if the National Research Institute of Maritime

Cultural Heritage in Korea, the National Center of Underwater Cultural Heritage in
China, and my university in Japan could work together in the field of underwater
archaeology, the famous quote “the pen is mightier than the sword” will be materialized
in this region.

5. What are some of the greatest challenges that your research area (as represented by
the papers in this session) faces at this time?
Among East Asian and Southeast Asian countries, still only Cambodia has ratified the
UNESCO 2001 convention.

In contrast, nearly 50 other nations worldwide have

already ratified this convention.

Even in Asia, including Japan, underwater

archaeologists cannot work without referring to the UNESCO convention. I am not a
politician, but hopefully every Asian government will start considering ratification for
future international cooperation.

6.

Are there any areas (geographic, thematic, or otherwise) within your topic (as

represented by the papers in this session) that you feel are underrepresented?
In Japan, we have just started to discuss how to deal with Japanese shipwrecks during
the First and the Second World Wars and human remains therein. According to the
UNESCO convention, all shipwrecks from World War II are not considered underwater
cultural heritage until 2045, but many underwater archaeologists have already worked

�them in the Pacific region. I think it is high time that underwater archaeologists in
countries concerned including Japan could establish an international research body or
organization for studying the shipwrecks as underwater cultural heritage.

7. What do you suggest to draw more attention to those areas?
In particular, at such an international gathering we will have to discuss how to treat
human remains from war shipwrecks.
different from Japanese philosophy.

As for them, Christianity is completely

According to the traditional Japanese belief,

human remains will never become underwater cultural heritage.

8. Any other comments you would like to make.
Although this conference is titled “Asia-Pacific Regional Conference”, unfortunately,
there are no Chinese, Koreans, or Japanese belonging to their home academic
institutions on the organizing committee of APCONF 2014.

Furthermore, Pacific

island nations such as Federated States of Micronesia or Tonga are also
underrepresented. Hopefully, the organizing committee of APCONF 2017 will have
some East Asian or Pacific representation within the structure.

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                  <text>Interview with Session 9 chair Dr. Akifumi Iwabuchi and links to the papers presented in the session.</text>
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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                <text>Interview with Session 9 chair Akifumi Iwabuchi.</text>
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                <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia. &#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection  of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities.  Papers on points raised from such case studies will also be welcomed. &#13;
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                    <text>Underwater Cultural Heritage Conservation and
the Convention Practice in China
Fan Yiran
National Center of Underwater Cultural Heritage, Beijing
People’s Republic of China, 100029
Email: fanyiran@vip.sina.com
Abstract
China has large number and various types of underwater cultural heritage resources,
which altogether forms an essential part of China’s cultural heritage. In order to manage
such valuable cultural resources, the nation has been playing the most important,
leading role and this state-led working mode is enabled through supports from all
aspects: organizational, legal, financial and institutional.
Starting from 1970s,
underwater archaeology went from foreshore to coastal waters then to high seas.
Currently, more than a hundred wreck sites have also been located in Chinese waters.
Several submerged ancient town remains and burial sites were also discovered. UCH
conservation is entering into a spanking new stage of expanding and transformation.
Through years of learning, comparison and practical experiences, one has to admit that
China has done quite a good job in preserving its underwater cultural heritage
resources. However, problems also exist. By now, China’s policy towards UCH
conservation is “centered on coastal areas, underline inshore waters, begin surveys in
internal waters and get ready for high seas. China sincerely hopes to facilitate more
international cooperative projects, and actively take part in the global UCH conservation
campaign.
Keywords: UCH, Underwater Cultural Heirtage, UCH in China, Convention Practice,
Nanhai I, Nan’ao I, Underwater Archaeology, White Crane Underwater Museum

Introduction
As we all know, China is famous for her long and brilliant culture. Possesses over
18000 kilometers’ coastline, nearly 300 square kilometers’ coastal areas and territorial
sea and more than 30 square kilometers’ inland waters, China is a nation with great sea
power. Its long navigation history and developed water transportation and trade system,
as well as the world famous Grand Canal and Maritime Silk Road, made China a
country of abundant underwater cultural heritage. At the present day, we are gradually
developing a proper way of UCH protection in China.
Current situation of UCH Conservation in China
In China, conservation and management of UCH is led by the central government, with

1

�support from authorities of all levels. Cross-sector cooperation is also pervasive in this
process.

However, the real business started rather late, in March 1987, state

administration of cultural heritage directed the establishment of the underwater
archaeology team, with support from various relevant governmental department and
organizations. Later in November, a research department on underwater archaeology
was formed within the National History Museum of China (Wu, 2007). The country’s
underwater archaeology began from that moment.
At the same time, relevant laws
and regulations provided all
actions a solid legal basis. In
1989, following the “Law of the
Peoples Republic of China on
Protection of Cultural Relics”1,
the state council enacted the
“Regulation
Republic

of
of

the

Peoples

China

on

Conservation and Management

Fig. 1 Recent Underwater Archaeological exploration
2
organized by the Center. (National Center of Underwater of Underwater Cultural Relics” ,
Cultural Heritage)
which has been the foundation

of all UCH conservation works in China for more than 20 years. As the situations are
becoming different day by day, relevant authorities are working actively for an updated
version of the regulation. All this time, the government has obtained great results in
fighting criminals since a range of activities fighting against looting and vandalism
according to the regulation has been proved effective. In today’s China, the State
Administration of Cultural heritage3 (SACH) is the leader of UCH conservation team,
while the National Center of Underwater Cultural Heritage (Fig. 1), directly under
SACH’s leadership, is the only national and newly established research organization
specially focusing on underwater archeology and UCH conservation. The National
Conservation Center for Underwater Cultural Heritage was established in 2009
(National Center of UCH of China , 2013), consisting of the Administration Office
(Secretary Office), Technique &amp; Equipment Department, Institute of Underwater
2

�Archaeology, Underwater Cultural Relics Protection and Conservation Department,
branch organizations are also under construction in Ningbo, Qingdao, Wuhan and
Fujian. The Center nicely played its function, actively developed UCH conservation,
research and excavation projects, and got fully confirmations from SACH, and local
governments and institutes.

It marked that UCH has got a new position as the

important content of the national cultural heritage and museum undertakings, and a new
chance of focused promotion and rapid development. Generally, the Center is
responsible for the works below:
-

Undertakes daily communication and coordination among ministries for national
UCH conservation issues;

-

Organizes, coordinates and implements national UCH surveys, excavations,
conservation, preservation, scientific research and trainings;

-

Draws up national UCH conservation plans, undertakes researches on related
legislation, protocols standards;

-

Undertakes the management, research and development of UCH conservation
technical equipment;

-

Carries on the management of the Nanhai UCH base and Xisha Archaeological
Workstation, and provides guidance on professional works of local UCH offices;

-

Facilitates and enables public outreach, international exchange and cooperation
of UCH conservation;

-

Carries on other tasks assigned by SACH.

Other than the Center, a national level organization, most coastal provinces have
established their own institutions and organizations working for underwater archeology
and UCH conservation, like the well-known Guangdong Maritime Silk Road Museum 4
and the Quanzhou Maritime Museum in Fujian Province 5. As components of the UCH
protection army in China, all these organizations and institutions greatly improved our
professional abilities and standards.
The government also paid great attention to professional training. SACH has held 5
professional underwater archeological training courses successively before 2009. And
in more recent time, in order to satisfy this expanding field, the Center has helped
SACH with one underwater archeology training courses and two relic preservation
3

�training course (Fig. 2). As a result, there are now over 100 underwater archeology
professionals and over 40 restoration/preservation professionals. They work in different
coastal cities, but can be gathered together when needed, which buys insurance for the
overall UCH conservation work.
Financially, the state government
has always been very generous
in

funding

works

related

to

conservation and management of
UCH.

Local government also

often paid big money since they
consider successful conservation
and

management

of

native

cultural heritage underwater is in Fig. 2 First Underwater Archaeological Training
a way an effective method to Programme. (National Center of Underwater Cultural
Heritage)

uncover local history, enhance
local identity and pass on significant cultural remains to future generations. And a fund
guarantee mechanism where the central government dominants and local government
facilitates has been well established. Aiming at bring UCH business forward; China
funded its very first underwater archaeology work ship in 2011. The SACH and the
Center organized and coordinated the design and the construction of the ship. This
ship, with a displacement of 930 tons and designed draft of 2.7 meters, is going to have
its maiden trip in April 2014 (Fig. 3). Development of such a wide range field needs
insight on international trend, which, China has always been paying attention to. For 20
years, China has been actively working with countries like Korea, Japan, Italy, France
and Indonesia and so on. During the process of international cooperation, our research
ability has been greatly improved and professional team strengthened. Experts from
abroad were often invited for talks, conferences and projects.

UCH Conservation in China: The Convention Spirit Practitioner
The UNESCO Convention on the Protection of Underwater Cultural Heritage, published
on 2 Nov, 2001, provided worldwide UCH conservation a scientific and formal reference,
4

�and

oriented

its

development

international cooperation.

towards

The convention is

also significant in terms of its philosophy:
emphasizes the transformation of underwater
archaeology into underwater cultural heritage;
draws attention to public education; underlines
the importance of in-situ conservation and
minimal intervention as well as pays respects
to human remains. Although currently not
being a contracting party of the convention,
China, nevertheless, has already taken part in
conserving underwater cultural heritage. With
quite a few major UCH projects undertaking,
this country is a true practitioner of the
convention as it will be outlined in the following
Fig. 3 Underwater Archaeology Workshop.
(National Center of Underwater Cultural
In-situ Practice in China: The White Crane Heritage)

section.

Underwater Museum6
An outstanding example of in-situ UCH conservation is the construction of the White
Crane Underwater Museum in Chong Qing (Fig. 4). This museum is by far the only
museum built in-situ built on a submerged site. Visitors can get 40 m underwater
through a corridor. Neither the site nor its surrounding environment had been greatly
changed, and this practice was widely recognized.

The Ridge of White Crane

(Baiheliang), a naturally formed sandstone bridge, locates in Yangzi River and can only
be seen in winter. It shows us 72 years of water level from 763 AD over 1200 years
from now. In order to keep the site original and integrated, we successfully made the
museum despite of the difficulties (Gao, 2012).

Practice on Increasing Public Awareness.
Following the convention’s notion of increasing public awareness, Chinese put lots of
efforts in presentation and interpretation of UCH through effective management
approaches.

The convention requires UCH to be made accessible for the public,
5

�especially for school education, and that is exactly what they did for the late Song
dynasty wreck South China Sea I. The Maritime Silk Road Museum7 of Guangdong is a
museum themed on this wreck and associated remains, since its opening in 2009; it has
welcomed over a million visitors of different types, making it a definite landmark of the
community.
Authorized

Salvage

Excavation:

Salvage as a Whole and In-situ
Excavation
Although the Convention believes insitu conservation is the first option, but
first choice does not necessarily to be
the priority. If the reason is sufficient
and urgent, partially or fully excavation
becomes a priority ahead of in-situ
conservation.

Because of

illegal

Fig. 4 The White Crane Underwater Museum.
smuggling and destruction associated
(National Center of Underwater Cultural Heritage)

with

these

illegal

practices,

we

conducted the scientific excavation by the authorization of the government, and
creatively began the method of “salvage as a whole and exhibit and excavate in-doors”
of large shipwrecks. “Nanhai I” was found in 1989 during the China-Japan cooperated
investigation of shipwrecks in South China Sea (Fig. 5). It is one of the few Song
dynasty ship found well preserved, thus with significant historical value.

However,

because it was located in the open sea, and it was difficult to monitor, it had been looted
and partially destroyed over the years. The successfully salvage of “Nanhai I” as a
whole was a good attempt of the comprehensive implementation of underwater
archaeology, relic conservation and maritime engineering. It is a strong evidence of the
multi-fields, multi-departments UCH cooperation in China, as well as the best
interpretation and scientific development of authority and integrity (Wei, 2008).
“Nan’ao I” was located in “Nan’ao” waters of Guangdong, miles from the seashore (Fig.
6). Since it had been looted and destroyed for many times in the past, we decided to do
the excavation. The project started in Sep. of 2009, though excavations happen in
6

�2010/2011 and 2012. More than 30 underwater archaeologists and over 10 specialized
conservators cooperated to finish the work, 3 professionals from Korea were also
invited. The team had mastered the distribution of the shipwreck and the structure, the
shipwreck heads north, leans east, 2485 cm in length, widest section was 750 cm, 25
boards. Cargos involve pottery and ceramic, metallic and organic relics. The basic
structure is complete, 26 thousands artifacts were lifted, sampled big amount of different
soils, remains of animals and plants, metal goods, and etc., did the comprehensive
research of scientific archaeology, animal archaeology and plant archaeology. The
maritime geological environment was mastered though sonar scans.

The team

established an iron conservation frame after the excavation was over in 2012, to
conserve the main body of the site in-situ (Chen, 2012).

Fig. 5 “Nanhai I” Shipwreck inside Maritime Silk Road Museum of Guangdong. (National Center of
Underwater Cultural Heritage)

Fight against Commercial Speculation and Trade
Chinese government actively carries out underwater cultural heritage protection;
7

�meanwhile

contribute

to

manage

multi-sectorial cooperation, to crack
down on destruction of the underwater
cultural heritage, such as looting
activities.
antiques

Due to the flourishing of
market

in

China

and

worldwide, the illegal activities such as
smuggling and looting of underwater
cultural relics have gone from bad to
worse among Chinese coastal areas. Fig. 6 Brown Glazed Porcelain from “Nan’ao I” wreck
site.

To

relieve

the

serious

(National Center of Underwater Cultural

situation, Heritage)

Chinese government has taken a
variety of methods. In recent years, in Hainan, Guangdong, Fujian province, the local
police uncovered several crimes on underwater cultural heritage.

For instance, in

Pingtan county of Fujian province, the local police uncovered 11 cases of relics crimes,
detained 40 people believed to be involved in the operations, and recovered 1700
pieces of historical artifacts, namely porcelain. In 2010, Chinese State Administration
of Cultural Heritage and the State Oceanic Administration signed "The cooperation
framework agreement of underwater cultural heritage protection”, the two sides will
jointly carry out eight aspects actions, such as underwater cultural heritage protection
strategy and planning, underwater archaeology, underwater cultural relics law
enforcement patrol and so on. At the same time we also actively explore the integrated
use of modern technology, including GPS, GIS and RS technology, security and
monitoring technology. In 2010, for example, we launched China's first underwater
cultural heritage monitoring security pilot project – Banyang reef I unmanned monitoring
system, in which Buoy monitoring system, sit bottom monitoring, the anti-frogman sonar
and unmanned aerial vehicle cooperative monitoring, 3G network monitoring, passive
sonar underwater monitoring technology solutions were proposed (Fan, 2013). At the
same time the system discussed the combination of technology defense and human
defense, as well as the improvement of laws and regulations. The system laid a solid
foundation of underwater cultural heritage monitoring, to strengthen the importance of
8

�security monitoring work in underwater cultural heritage protection.
Conclusion
Currently, more than a hundred wreck sites have been located in Chinese waters.
Several submerged ancient town remains and burial sites were also discovered. UCH
conservation is entering into a promising new stage of expansion and transformation.
We can summarize this process into five aspects:
1.

Academic and practical development from underwater archaeology alone to
sophisticated UCH conservation and management (Ding and Fan, 2013);

2.

Working area getting from foreshore to coastal waters then to high seas;

3.

Projects implementation starting to include more stakeholders, departments and
organizations;

4.

UCH conservation turning from academic and governmental behavior into a
business involving the public;

5.

Developments emphasizing on diversified and in-depth international cooperation

Through years of learning, comparison and practical experiences, one has to admit that
China has done quite a good job in preserving its underwater cultural heritage
resources. However, problems also exist. Firstly, top-down system and professional
training makes UCH conservation easy to manage. But traditional maritime culture and
outdated legal protection somehow negatively affect our work. Secondly, the concept of
underwater archaeology and underwater cultural heritage has not been clearly defined,
which led to bias in actual field work. At the same time, ideas and philosophies of the
Convention have not draw enough attention in Chinese academia. Third, in terms of
research method and theories on UCH conservation and management, there is still a
big gap between Chinese and advanced international standards. Meanwhile, diving
skills received too much attention from professionals.

Balance should be achieved

although current results are encouraging. Finally, in spite of being a focus of attention
worldwide, China’s UCH conservation and management works have not become an
organic component of this multinational field of study. By now, China’s policy towards
UCH conservation is “centered on coastal areas, underline inshore waters, start surveys
in internal waters and prepare for high seas. China sincerely hopes to facilitate more
9

�international cooperative projects, and to actively take part in the global UCH
conservation campaign.
Acknowledgement
Sincere thanks to the conference committee for inviting and providing an opportunity for
me to share the ideas and knowledge of UCH conservation business in China with
experts and professionals from different countries. Also I would like to thank my
colleagues, Liu shuguang, Chai xiaoming and Sunjian and so on, they gave me huge
support in writing this article. So as my daughter and husband, I would not be able to
spend time and energy in work without their care and understanding.
Endnote
1

See English version here: http://www.sach.gov.cn/art/2007/10/29/art_1591_58336.html
See English version here: http://www.law-lib.com/lawhtm/1989/6039.htm
3
See website here: http://www.sach.gov.cn/
4
http://www.msrmuseum.com/index.aspx
5
http://www.qzhjg.com/
6
http://www.cqbhl.com.cn/
7
See: http://www.msrmuseum.com/index.aspx
2

References
Chen, R., 2012. Nao'ao I in Eyes of Site Manager Cuiyong.
Ding, J., and Fan, Y., 2013. A Few Issues on Underwater Archaeology. China Cultural
Heritage Scientific Research .
Fan, Y., 2013. Safty Monitoring of UCH in China. Cultural Relics in Southern China .
Gao, Y., 2012. Constructon of the White Crane Museum and UCH Management.
Journal of Chongqing University of Arts and Sciences (Social Sciences Edition) .
National Center of UCH of China. 2013. Introduction to National Center of UCH of China,
retrieved 01 20, 2014, from Chinese Academy of Cultural Heritage:
http://www.cach.org.cn/tabid/169/InfoID/577/frtid/167/Default.aspx
Wei, J., 2008. "Nanhai I" Shipwreck Archaeology and UCH Management. Cultural
Heritage .
Wu, Chunming., 2007. Maritime Archaeology. Beijing, Science Press China.
Biography
Fan Yiran worked as a news reporter, and started to cover live broadcast of underwater
cultural heritage conservation fieldwork since 2000. She changed her career later in
2005 and stepped into UCH business in 2009. She is now working in the National
Center of Underwater Cultural Heritage as the director of the general office. Yiran is the
first female underwater news reporter in China. And after her transformation into an
underwater archaeologist, she participated in various UCH conservation projects
including “Nanhai I” and “Nan’ao I” wreck sites and has led series of UCH survey project
in Liaoning, Tianjin and Hebei.
10

�11

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                  <text>Session 9: History and Current Trends of Underwater Archaeology around East Asia</text>
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                  <text>Interview with Session 9 chair Dr. Akifumi Iwabuchi and links to the papers presented in the session.</text>
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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                  <text>Dr. Akifumi Iwabuchi</text>
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                <text>Underwater Cultural Heritage Conservation and  the Convention Practice in China</text>
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                <text>China has large number and various types of underwater cultural heritage resources, which altogether forms an essential part of Chinaâ€™s cultural heritage. In order to manage such valuable cultural resources, the nation has been playing the most important, leading role and this state-led working mode is enabled through supports from all aspects: organizational, legal, financial and institutional.  Starting from 1970s, underwater archaeology went from foreshore to coastal waters then to high seas. Currently, more than a hundred wreck sites have also been located in Chinese waters. Several submerged ancient town remains and burial sites were also discovered. UCH conservation is entering into a spanking new stage of expanding and transformation. Through years of learning, comparison and practical experiences, one has to admit that China has done quite a good job in preserving its underwater cultural heritage resources. However, problems also exist.  By now, Chinaâ€™s policy towards UCH conservation is â€œcentered on coastal areas, underline inshore waters, begin surveys in internal waters and get ready for high seas. China sincerely hopes to facilitate more international cooperative projects, and actively take part in the global UCH conservation campaign.</text>
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                <text>Fan Yiran, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.)</text>
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                <text>5/15/2014</text>
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                    <text>Stone Tidal Weirs, Underwater Cultural Heritage or Not?

Akifumi Iwabuchi
Tokyo University of Marine Science and Technology, Tokyo, Japan, 135-8533
Email: iwabuchi@kaiyodai.ac.jp
Abstract
The stone tidal weir is a kind of fish trap, made of numerous rocks or reef limestones,
which extends along the shoreline on a colossal scale in semicircular, half-quadrilateral,
or almost linear shape. At the flood tide these weirs are submerged beneath the sea,
while they emerge into full view at the ebb. Using with nets or tridents, fishermen, inside
the weirs at low tides, catch fish that fails to escape because of the stone walls. They
could be observed in the Pacific or the Yap Islands, in the Indian Ocean or the east
African coast, and in the Atlantic or Oleron and Ré Islands. The UNESCO’s 2001
Convention regards this weir as underwater cultural heritage, because it has been
partially or totally under water, periodically or continuously, for at least 100 years; stone
tidal weirs have been built in France since the 11th century and a historical record notes
that one weir in the Ryukyu Islands was built in the 17th century. In Japan every weir is
considered not to be buried cultural property or cultural heritage investigated by
archaeologists, but to be folk cultural asset studied by anthropologists, according to its
domestic law for the protection of cultural properties. Even now in many countries stone
tidal weirs are continuously built or restored by locals. Owing to the contemporary trait, it
is not easy to preserve them under the name of underwater cultural heritage.
Sometimes their bases were constructed several hundred years ago while their upper
parts were repaired very recently.
Key words: stone weir, tide, fish trap, underwater cultural heritage, 2001 Convention

Introduction
The stone tidal weir is a kind of fish trap, made of numerous rocks, boulders, or reef
limestones, which extends along the shoreline on a colossal scale (Fig. 1), in
semicircular, circular, half-quadrilateral, horseshoe, keyhole, or almost linear shape. At
the flow tide it is completely submerged beneath the sea, while at the ebb, in particular
during the spring tide, it gives its entire figure on the tidal zone. Then, fishermen step
into such weirs in order to catch fish, which fails to escape from them owing to the stone
walls, by hand or with small fishing gears such as hand-nets or tridents (Fig. 2).
Occasionally, some opening spaces between stone walls or tunnels under each wall are
cut through a weir for the purpose of being drained water easily and being gathered
preys; outside such spaces or tunnels, fishing nets, gratings, or basket traps are usually
1

�set. The passive fishing gear of stone
tidal weir, which operates only on the
strength of tidal amplitude, is different
from the active fishing gear of fish
fence

or

trapped

chamber,

which

guides the fish into the specially
arranged ends or labyrinths where they
are trapped (Gabriel et al., 2005).
Fig. 1 Stone Tidal Weir in Japan. (A. Iwabuchi)

Usually, however, we cannot draw a
hard and fast line between those two

kinds of gears. Some stone tidal weirs have pectinate fish fences which project from
their walls, and some have labyrinths at their outer tips.
A Wide Distribution
Stone tidal weirs could widely be observed all over the world, viz. in tidal zones of
western Japan, southern Korea, Formosa, Southeast Asia, Micronesia, Polynesia,
Melanesia, the Indian Ocean, and Europe. In Kyushu Island and its adjacent small
islands of western Japan, stone tidal weirs are named ishihibi or sukki. Around Ariake
Bay of Kyushu Island, approximately 200 weirs did exist around 1707, and then until
recently no less than 100 stone tidal weirs were still on active service. The most famous
one was ‘Bora-zukki’ or ‘Mullet Tidal Weir’, which was filled up innumerable mullet in
1881; there is a stone monument in commemoration of this event on the seashore near
this stone tidal weir’s ruin. In the Ryukyu or Okinawa Islands, they are named kaki,
which used to number about 100 (Iwabuchi, 2012a). In 1972, there were 27 stone tidal
weirs around Kohama Island: 7were still on active service, 11 were abandoned, and 9
were left only their traces. Other than the last 9 disappeared weirs, however, it is said
that many small stone tidal weirs which has already faded completely out from sight
seem to have existed before. In this isle of the Ryukyu Islands some stone tidal weirs
have semicircular shape and some have linear one. The length of stone walls varies in
stone tidal weirs; the longest wall is approximately 800 m, while the shortest one is 200
m (Yano et al., 2002). Generally in Japan, including this isle, stone tidal weirs are
owned not by professional fishers but by local peasants.
2

�In southern Korea, the stone tidal weirs
are

called

dŏksal,

sŏkpangryŏm,

sŏkchŏn, or wŏn. Although they used to
be important at Korean traditional fishery,
their number has already decreased to
an extreme. Around Jeju Island in the
Korea Strait, 4 stone tidal weirs are still
being used, in particular, for the sake of
catching anchovies. In Formosa around
the Penghu Islands, there are still
approximately 500 stone tidal weirs
named chioh-ho. In terms of their types,
they could be divided into three. The first
consists of traditional semicircular or
horseshoe-shaped stone tidal weirs. The
second is composed ofstone tidal weirs,
each of which has several pectinate Fig. 2 Japanese Fisher. (A. Iwabuchi)
short stone walls extended inward from
an original stone wall; these short walls serve for driving fish as well as for dividing a
stone tidal weir into several parts with each family’s fishing right. The last type is stone
tidal weirs, each of which has at its tip a labyrinth as fish trap. In the Penghu Islands, the
golden age of stone tidal weirs, which used to one of the most important fishing
methods at coastal villages there, was 100 years ago, but their economic or social value
has already been diminished mainly because of modern onshore fishery. Nowadays
their touristic and educational purposes are more stressed (Tawa, 2007). In Southeast
Asia, stone tidal weirs are reported to be in the Philippines, Thailand, and Indonesia. In
the Philippines, the stone tidal weirs named atob around the Visaya Islands already
existed at the beginning of the 20th century, and then still in the 1970’s new weirs kept
being built or old weirs kept being restored (Tawa, 2007). Eastern Indonesia seems
perhaps to be the world-centre of stone tidal weirs:

3

�Stone walls in tidal areas can be used in a similar manner, as is done in Indonesia
(western Flores). There, a wall is built in the shallow water parallel to the sea shore.
As in some of the Japanese stone walls, there are passages through which the fish
can enter with the flood, but they are prevented from escaping on the ebb tide. The
outlets are closed and the fish remain in the water-filled channel behind the walls
until they are collected (Gabriel et al., 2005).
In Indonesia, fish fences set in the form of labyrinths, made of brushwood, are
ubiquitous on tidal zones, and stone tidal weirs as primordial type of such fish fences
are still widely used; new ones are also continuously built by locals, in particular, when
famine strikes maritime settlements. Almost all islands of Micronesia, including the
Caroline, Palau, or Gilbert Islands, used to have millions of stone tidal weirs around
them. In the Chuuk Islands the stone tidal weirs are named maai and in the Yap Islands
aech. In the former, there are three types, i.e. conventional semicircular type, tennis
racket-shaped one, and inverted keyhole-shaped one. In the last type, the seaward
open side of each weir seems to be closed by fishing nets or trap baskets when the tide
is on the ebb. In the Yap Islands, the stone circle of the Chuuk’s second type is
transformed into the boomerang-shaped or arrow-shaped stone circle, inside which
people catch fish at the ebb. There, however, some do not have ‘racket’ shafts lying
perpendicular to the shoreline. In olden times, moreover, there inverted triangular stone
weirs seem to have existed; as the outward bottom of each triangle did not possess any
stone walls, locals set nets or trap baskets when the tide was outgoing (Tawa, 2007).
They say that possibly more than a thousand years or more ago these weirs were built,
and from 700 to 800 stone tidal weirs have been documented (Guérin et al., 2010), but
with reducing island population after Europeans arrived those stone tidal weirs began
falling away into disuse. At the end of the last century, many seemed to have been
abandoned and never been repaired again.
In the Hawaii Islands, the stone tidal weirs are called loko ‘umeiki. There, there are also
many fishponds named lokokuapa, of which shapes are entirely similar to conventional
stone tidal weirs. Some fishponds are built across the mouth of a small bay or between
two points of land, and some semicircular-shaped ones are built independently on
seashores in order to be raised fish such as mullet or milkfish. Contrariwise, each stone
tidal weir is surrounded by a low wall that is submerged at the high tide and has opening,
4

�walled on each side like lanes, leading in or out of the weir (Nishimura, 1981). In
Rarotonga Island of the Cook Islands every tidal weir is also used as fish trap into which
fish is driven toward nets between boulders by locals, although its detail is not clear.
There it is named pā (Takeda, 1993), which originally means an eel weir in the Maori
language. The Maori of New Zealand uses even today stone walls for their eel fishery;
these are not artificial, but built by nature by the strong wave of the sea (Gabriel et al.,
2005). Around many islands in Torres Strait as well as around Cape York at Melanesia,
numerous stone tidal weirs could be observed, and they represent the most obvious
fishing technique utilized in this area.
On the eastern aspect of the large fringing reefs of a few of the western islands,
but notably in the eastern islands, long low walls of unworked boulders of stone
were built, or rather piled up, to a height of three or four feet. These walls enclosed
large irregular areas of the reef, graz(W.), sai (E.). During the north-west monsoon,
when the sea is calm on the lee-side of the island, large numbers of fish swim over
the walls at high tide, they are prevented by the low night tide from escaping and
so fall an easy prey (Haddon, 1912).
Of the Eastern Islands around Darnley Island there are 34 stone tidal weirs, and in
Stephens Island there are 23. Some have at their tips protruding navels without
labyrinth where a lot of fish gather at the ebb (Barham, 2000). Similar navels are
reported from stone tidal weirs of the Ryukyu Islands or of southern Korea. Around the
Indian Ocean, much information upon stone tidal weirs is not available. It is said that
the Mascarene Islands (Yabuuchi, 1978) and the Lakshadweep Islands have stone tidal
weirs. In the latter, the stone tidal weirs are called padhi; as their open ends face the
lagoon while the seaward ends are usually closed, fish that tries to leave the lagoon
during receding tide enters and remains in the enclosure. They are family owned
properties which are acquired by inheritance (Anand, 1996). Along the East African
coast, there seem to be stone tidal weirs. Coast Bushmen and pastoral Hottentots are
reported to have constructed and used stone tidal weirs (Nishimura, 1981). Near the
towns of Stilbaai and Arniston in South Africa there are stone tidal weirs (Parthesius,
2011), but the relation between these weirs and ones by Bushman and Hottentots is
obscure. Along the western coast of Africa, stone tidal weirs are constructed by natives,
such as Guineans (Gabriel et al., 2005), but we do not really know much about them.
5

�There are many stone tidal weirs in
Scotland (Bowens, 2009) or in western
France. Ré, Aix, and Oleron Islands off
the western coast of mainland France
would be the European centre of stone
tidal weirs. In Oleron Island there were
about 40 stone tidal weirs at the end of
the 19th century (Bithoneau et al.,
1993), while in Ré Island there were
something

over

beginning

of

30
the

weirs

at

the

15th

century,

approximately 140 in the latter part of
the 19th century, and only 14 at the end
of the 20th century. A French stone tidal
weir is named l'écluseàpoissons and
weirs are les éclusesàpoissons, but all
tidal weirs have their own proper
names. The largest stone tidal weir at

Fig. 3 ‘Mouffet’ in Ré Island. (A. Iwabuchi)

Ré Island, whose length is about 1000
m, is named 'Mouffet' or 'Skunk' (Fig. 3), and the smallest one, whose length is about
300 m only, is 'Le Petit-Port' or 'Small Port'. Every weir is collectively owned by local
peasants who catch fish at time assigned as separately with a hand-net or a trident
inside his weir sometimes in the daytime and sometimes at night. One stone tidal weirs
named 'La Belle-Pointe' is equipped a metal basket trap, as replica of an old wooden
basket, on the outer side of a drain gap between the stone walls (Fig. 4). Fish caught is
only for domestic consumption; it is never on the distribution channel to commercial fish
markets (Iwabuchi, 2002).
Stone Tidal Weirs and the UNESCO’s 2001 Convention
Article 1-1 of the UNESCO’s 2001 Convention on the Protection of the Underwater
Cultural Heritage provides that ‘underwater cultural heritage’ means all traces of human
existence having a cultural, historical or archaeological character which have been
6

�partially or totally under water, periodically or continuously, for at least 100 years. First of
all, all stone tidal weirs are partially or totally under water periodically, and so they do
correspond to the first half of the above definition. However, not all stone tidal weirs are
more than 100 years old. Indigenous people in Southeast Asia or in the Pacific are still
constructing new weirs every day. Owing to ecological conditions, nonetheless, they
seem not to build stone tidal weirs on completely virgin tidal zones. They always build
them exactly on traces for old weirs or, at least, on tidal zones which used to have
millions of old stone tidal weirs.

These days, in other words, most locals are, not

constructing, but repairing old weirs every day. According to A. C. Haddon, no native
within the memory of man ever made a stone tidal weir around Torres strait, and all they
can do now is to repair them (Haddon, 1912).

Fig. 4 ‘Le Petit-Port’ in Ré Island. (A. Iwabuchi)

It is within the bounds of possibility that only the lower parts or stones of a new tidal weir
or its basement are more than 100 years old. However, it is extremely difficult to guess
7

�how old even its base is, mainly because no written historical material is recorded for
almost all stone tidal weirs. Some anthropologists insist that the stone tidal weir itself is
considered a very old fishing method, and some existing today date back to early
Neolithic times, and even to the pre-Sapiens phase of human evolution (Nishimura,
1968). It is true that contemporary foragers are also using a kind of stone tidal weir.
Canadian Eskimo, for example, uses not only fish traps but also stone tidal weirs named
haput’. This horseshoe-shaped weir is built at a river mouth. Its stone wall seems to be
extremely low, in comparison with Taiwanese or French walls, but it is completely
submerged at the high tide and then at the ebb foragers go into the weir, which has
depth 60 cm only, to catch charr. Similarly, northwest coast Indians used to build stone
tidal weirs, in particular, at river mouths (Stewart, 1993). It is said that Australian
aborigines also use stone tidal weirs. Impounding shallow enclosure of boulder fences
were formerly in use among them, although Hornell classifies this technology as fish
trap, not as stone tidal weir (Hornell, 1950).
Nevertheless, stone tidal weirs among primitive foragers are rather smaller-scaled than
modern tidal weirs observed in Japan, Formosa, or France. Very few written records
say that the large-scaled stone tidal weirs were all constructed during the feudal age. In
Ré Island, stone tidal weirs were started to be constructed at the 11th century or at the
Middle Age (Boucard, 1984). In Kyushu Island of western Japan their golden age was
around 1707; the local feudal lord imposed corvée to the peasants to construct or
restore large-scaled stone tidal weirs. In the Ryukyu Islands, there is one historical
document written in 1824 telling us that a female priest who was granted an official
court rank by the lord of Ryukyu kingdom mobilized commoners by royal decree to build
a stone tidal weir whose length was about 1200 m around the 17th century (Nishimura,
1975; 1981). In Korea and Formosa, there is no evidence that the class of rulers played
a large role in constructing stone tidal weirs, but usually all the villagers seem to have
turned out in full force for restoring or building them. Without substantial labour power, it
would not have succeeded in constructing large-scaled stone weirs. In the Hawaii
islands as well, the remarkably well-preserved chain of offshore fishponds is a leftover
of local chiefs, and the ponds are raised fish to feed the ruling class (Nishimura, 1981).
Indeed, for example, the Torres Strait Islands do not have any feudal systems, but at
8

�least the society is not a band-based foraging one but a horticultural chiefdom. At those
coastal hamlets there seem to have been powerful builders or chiefs who had mobilized
villagers in order to construct or repair stone tidal weirs (Haddon, 1912). Building stone
tidal weirs might have something to with the population growth as well as with the
pressure on food production, with which people in power had normally to cope. In the
Yap Islands, the peak of stone tidal weirs seems to have been at the beginning of the
19th century, when they had the largest population. These stone tidal weirs at the
chiefdom level would not look directly to link up with ones at the band level, although
their method and concept could ‘take place sometimes in antiquity’ (Barham, 2000).
Judging from instances from the Far East and the South Pacific, it is morally certain that
almost all stone tidal weirs, or at least their bases, all over the worldat present might
have been constructed more than 100 years ago. Perhaps, however, weirs which we
could see these days could date back only to not more than several hundred years ago,
not to more than 100 thousand years.In short, most stone tidal weirs may not be objects
of prehistoric character, but important human sites, structures, buildings, or artifacts
together with their archaeological and natural context.
How to Protect Stone Tidal Weirs
Although stone tidal weirs are still being constructed or restored in remote regions on
the earth, they are quickly disappearing, being destroyed, or being abandoned, in
particular, in civilized countries. Nowadays, first of all, stone tidal weirs cannot catch
fish as much as in olden times, because of the intensification of modern fishery on their
outsides. Owners of stone tidal weirs are normally local peasants, while onshore fishing
are conducted by professional fishers who think weirs as fish stealing traps or as
shipping obstacles.

Secondly, the modern coastal management for tourism or for

industrialization is not always happy with stone tidal weirs which occupy the huge area
of tidal zones. For many hotels or fishers stone tidal weirs are only eyesores and real
pains in the neck; in actual practice tourists’ water motorcycles as well as commercial
fishing boats sometimes split on stone tidal weirs. On the contrary, however, the new
movements, in which locals make good use of stone tidal weirs for tourism or for activity
aimed at enlivening coastal communities, have just begun on grassroots levels,
although they are still minor. In France' Association de défense des eclusesà poissons
9

�de l'île de Ré'or in Japan ‘Ishihimi Summit’ has been organized to plan events, for
instance, so tourists could experience fishing inside stone tidal weirs, or to restore old
weirs jointly.
On national levels, on the other hand, the conservation activity or management of stone
tidal weirs as underwater cultural heritage has not been started yet. Even in France,
which has already ratified the UNESCO’s 2001 Convention, we have never heard that
the Département des recherchesarchéologiquessubaquatiqueset sous-marines were
doing research upon stone tidal weirs in western France. In Japan, some stone tidal
weirs are under the control of the domestic law for the protection of cultural properties,
but they are not to be buried cultural property, which is normally studied by
archaeologists, but to be folk cultural asset or cultural landscape, which is always
studied by anthropologists or by folklorists. Famous Mongolian shipwrecks of northern
Kyushu Island are, of course, designated as buried cultural property. In 2006, owing to
the bureaucratic sectionalism, not the Agent for Cultural Affairs, but the Fisheries
Agency was designated two stone tidal weirs in Japan as selections of 100 historical
and cultural heritage sites and heirlooms related to fisheries and fishing villages which
we would like to hand down to future generations. However, both central government
offices would not plan to excavate either bases of any stone tidal weirs or traces of their
old ruins to identify, for instance, when they were built or how large they used to be,
because no Japanese civil servant regards them as study object of archaeology, i.e.
underwater cultural heritage.
Conclusion
In Japan a research group from Waseda University, Tokyo, which was directed by an
anthropologist, started its academic investigation upon stone tidal weirs in 1956, which
might be the world-first comprehensive field survey on them. However, no introductory
book to underwater archaeology does not mention this important research. On the
other hand, all books give the detailed description of the Swedish Vasa project which
began in the same year. Even in Japan, no underwater archeological booklet treats this
historical research activity, while all do the salvage of the wreck of Kaiyo-maru at
northern Japan which began in 1974. Besides as for stone tidal weirs themselves, only
two introductory books to underwater archaeology have referred to them unusually: one
10

�is in English (Bowens, 2009), and the other is in Japanese (Iwabuchi, 2012b). Indeed,
underwater archeologists have not much been interested in stone tidal weirs, partly
because they have been or are concerned about conventional shipwrecks, and partly
because stone tidal weirs have mainly been studied, not by archaeologists, but by
anthropologists, by folklorists, or by geographers. As mentioned before, nevertheless,
the stone tidal weir does be true underwater cultural heritage according to the
UNESCO’s 2001 Convention. Stone tidal weirs are as important as shipwrecks such as
the Uluburun or the Sinan ship.
References
Anand, P. E. V., 1996. Fishing Methods in Lakshadweep. Infofish International, Vol. 3:
57-65.
Barham, A. J., 2000. Late Holocene Maritime Societies in the Torres Strait Islands,
Northern Australia. In S. O’Connor and P. Veth (Eds.), East of Wallace’s Line, Balkema
Publishers, Rotterdam: 223-314.
Bithoneau, R., and Morisset, C., 1993.

Les éclusesàpoissons de l'îled'Oleron. Les

Cahiers d'Oleron, (2nd edition), Vol. 10: 5-9
Boucard, J., 1984. Les éclusesàpoisonsdansl'île de Ré. Rupella, La Rochelle.
Bowens, A., (Ed.), 2009. Underwater Archaeology. Blackwell, Oxford, (2nd edition).
Gabriel, O., Lange, K., Dahm, E.,and Wendt, T., (Eds.), 2005. Fish Catching Methods of
the World, Blackwell, Oxford, (4th edition).
Guérin, U., Egger, B., and Penalva, V., (Eds), 2010. Underwater Cultural Heritage in
Oceania. UNESCO, Paris.
Haddon, A. C., 1912. Reports of the Cambridge Anthropological Expedition to Torres
Straits, Vol. 4 (Arts and Crafts), Cambridge University Press, Cambridge.
Hornell, J., 1950. Fishing in Many Waters. Cambridge University Press, Cambridge.
Iwabuchi, A., 2002. Stone Tidal Weirs at Ré Island of Western France. Proceedings of
the Lecture Meeting at Tokyo University of Mercantile Marine, Vol. 50: 45-48 (in
Japanese).
Iwabuchi, A., 2012a. Stone Tidal Weirs. In Asian Research Institute of Underwater
Archaeology (Ed.), The Database of Underwater Cultural Heritage and Promotion of
Underwater Archaeology: the Nansei Islands, the Asian Research Institute of
11

�Underwater Archaeology, Fukuoka: 97-99 (in Japanese).
Iwabuchi, A., 2012b. The Sea Possessing Cultural Heritage. Kagaku-dojin, Kyoto (in
Japanese).
Nishimura, A., 1968. Primitive Fishing Methods. In A. Smith (Ed.), Ryukyuan Culture
and Society, University of Hawaii Press, Honolulu: 67-77.
Nishimura, A., 1975. Cultural and Social Change in the Modes of Ownership of Stone
Tidal Weirs. In R. W. Casteel and G. I. Quimby (Eds.), Maritime Adaptations of the
Pacific, Mouton Publishers, The Hague: 77-88.
Nishimura, A., 1981. Maritime Counterpart to Megalithic Culture on Land. Journal de la
Société des Océanistes, Vol. 37: 255-266.
Parthesius, R., 2011. Shared Heritage? Shared Responsibility? In M. Staniforth, J. Craig,
S. C. Jago-on, B. Orillaneda and L. Lacsina (Eds.), Proceedings on the Asia-Pacific
Regional Conference on Underwater Cultural Heritage, 8-12 Nov. 2011, Manila: 641-651.
Stewart, H., 1993. A Tidal Stone Weir in the Arctic. The Historical Review, Vol. 128: 6479 (in Japanese).
Takeda, J., 1993. Offerings from the Sea. Shiosai, Vol. 9: 48-51 (in Japanese).
Tawa, M., 2007. Stone Tidal Weirs. Hosei University Press, Tokyo (in Japanese).
Yabuuchi, Y., 1978.

A Basic Written Material of Fishing Anthropology and its

Complementary Study. Kazama-shobo, Tokyo (in Japanese).
Yano, T., Nakamura, T.and Yamazaki, M., 2002.The Stone Tidal Weirs in Kohama Island,
Ryukyu. Waseda Studies in Human Sciences, Vol. 15 (1): 47-83 (in Japanese).
Biography
Akifumi Iwabuchi is professor of Marine Culturology at Tokyo University of Marine
Science and Technology, being also a director of the Japan Society for Nautical
Research and ARIUA, ICOMOS-ICUCH delegate for Japan, and INA research associate.
He received his PhD from the University of Oxford in 1990. His publications include The
People of the Alas Valley (Clarendon Press, 1994) and The Sea Possessing Cultural
Heritage (Kagaku-dojin, 2012). His university, UNESCO Underwater Archaeology Unit
win Network member, is the only one academic institution, teaching and studying
nautical archaeology, inside Japan; to PhD candidates from foreign countries the
governmental scholarship schemes are available.

12

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                  <text>Interview with Session 9 chair Dr. Akifumi Iwabuchi and links to the papers presented in the session.</text>
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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                <text>The stone tidal weir is a kind of fish trap, made of numerous rocks or reef limestones, which extends along the shoreline on a colossal scale in semicircular, half-quadrilateral, or almost linear shape. At the flood tide these weirs are submerged beneath the sea, while they emerge into full view at the ebb. Using with nets or tridents, fishermen, inside the weirs at low tides, catch fish that fails to escape because of the stone walls.  They could be observed in the Pacific or the Yap Islands, in the Indian Ocean or the east African coast, and in the Atlantic or Oleron and RÃ© Islands. The UNESCOâ€™s 2001 Convention regards this weir as underwater cultural heritage, because it has been partially or totally under water, periodically or continuously, for at least 100 years; stone tidal weirs have been built in France since the 11th century and a historical record notes that one weir in the Ryukyu Islands was built in the 17th century.  In Japan every weir is considered not to be buried cultural property or cultural heritage investigated by archaeologists, but to be folk cultural asset studied by anthropologists, according to its domestic law for the protection of cultural properties.  Even now in many countries stone tidal weirs are continuously built or restored by locals. Owing to the contemporary trait, it is not easy to preserve them under the name of underwater cultural heritage. Sometimes their bases were constructed several hundred years ago while their upper parts were repaired very recently.</text>
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                <text>Akifumi Iwabuchi, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.)</text>
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                <text>5/15/2014</text>
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                    <text>Distributional Survey of Underwater Cultural Heritage and its
Experimental Presentation in the Ryukyu Archipelago
Chiaki Katagiri
Okinawa Prefectural Museum and Art Museum, Naha, Japan, 900-0006
Email: katgiric@pref.okinawa.lg.jp
Yuji Yamamoto
Asian Research Institute of Underwater Archaeology, Fukuoka, Japan, 812-0041
Email: yamamoto@f-creer.com
Yumiko Nakanishi, Osaka Prefectural Government, Osaka, Japan, 559-0034
Email: NakanishiYum@mbox.pref.osaka.lg.jp
Abstract
The Ryukyu Archipelago is located at the northwestern Pacific, between the islands of
Formosa and Kyushu of southern Japan. It consists of 199 islands of all dimensions and
the total range of its accurate distribution lengthen is approximately 1,200 km. Since the
first human beings settled down on the archipelago during the Pleistocene, they have
been living close by the sea there. The local populations have recognized maritime
resources as a main and important nutritious food since the prehistoric era, while the
Ryukyu kingdom used to be prosperous unprecedentedly in terms of seaborne oversea
trade among Japan, China, and Southeast Asia. In the Ryukyu archipelago, the
distributional survey of underwater cultural heritage has lately been conducted by the
Nansei Islands Underwater Cultural Heritage Study Group, the Okinawa Prefectural
Archaeological Center, the Asian Research Institute of Underwater Archaeology, and
Kagoshima University, in order to assess its numbers, typologies, actual conditions, and
so on. According to the research, 235 sites of underwater or maritime cultural heritage
have already been confirmed: 9 shipwrecks, 33 submerged ports, 15 places where boat
cargos are scattered on the seabed, 72 places where old boat cargos and other
remains are found along the coasts, 30 stone anchors and cargos on land, 28 quarries,
45 stone tidal weirs, and 3 salt works. In 2011, as a result of the survey, an underwater
cultural heritage presentation or guidance tour was carried out in Kume Island.
Presumably, this experimental trial will lead the public to having the sense to
acknowledge and protect underwater cultural heritage in the future.
Key words: Ryukyu Archipelago, Ryukyu Kingdom, Transit trade, Distributional Survey,
Open day
Introduction
The Ryukyu Archipelago consists of 199 islands of various sizes ranging about 1,200
km between Kyushu Island, the southernmost island of the Japanese Archipelago, and
1

�Taiwan in the northwestern coastal Pacific. The first humans reached there in the late
Pleistocene and have long been living a life highly connected to the sea since then.
Marine resources had been their major food source in prehistory, and the islands have
prospered because of overseas exchanges using ships and the sea from the Gusuku
Period to the Sanzan Period (from the latter half of 11thcentury to 1429 AD). The tidal
zone was actively utilized for production activities until 1879, when the Ryukyu Kingdom
became an independent state. Recent research accumulation revealed the numbers
and types of underwater cultural heritage in this region by the Nansei Islands
Underwater Cultural Heritage Study Group, the Okinawa Prefectural Archaeological
Center, the Okinawa Prefectural Museum and Art Museum, the Asian Research
Institute of Underwater Archaeology, Kagoshima University, Tokai University and
Research Institute for Humanity and Nature, and so on. It is notable that such
researches include a whole series of different kinds
of methods, such as collection of oral histories,
interviews, archival researches, walking survey of the
coastal area and the seabed, and the like.
Based on the results of such researches, we have an
underwater site open day in Kumejima Island in
Okinawa for its experimental presentation on 11th
September 2011 and 28th September 2013. On
those days, we invited the willing public to visit and
see underwater sites under the supervision and

Fig.
1
Location
of
Archipelago.
(C.
Katagiri)
guidance by the experts. The Ohajima Underwater

Ryukyu

Site was selected for the subject of this experimental presentation as it was the most
suitable site on many reasons. We have collected the data regarding the interest of the
visitors, trying to justify the validity of the method we have adopted. The research aims
to lead to the protection and utilization of underwater cultural heritage.
Types and numbers of the sites holding Underwater Cultural Heritage
As shown in the Table 1, the area of sea around the Ryukyu Archipelago holds a wide
variety of underwater cultural heritage. 9 shipwreck sites, 15 seabed artifact scattering
sites (loads only, no hull found), 33 submerged ports, 72 coastal artifact scattering sites,
2

�76 production sites (28 quarries, 45 stone tidal weirs, an 3 salt pans), and 30 sites with
findings on land, such as stone and iron anchors are so far found and categorized.
type

number

contents

a Shipwreck sites

9

Shipwreck

b Sseabed artefact scattering sites

13

Only cargo, Almost ceramics

c Ports

33

artefacts of various periods

d Coastal artefact scattering sites

71

artefacts of various periods

e Quarries

28

Sites to cut out stone

f

45

Stationary fishing gear

g Soltworks

3

Sites to produced the salt

h Related underwater cultural heritage

30

Aimost Anchor of the ship

Ⅰ Sites due to the marine accidents

Ⅱ　Site formed by the frequent use of the sae
and coasal areas

Ⅲ　Sites due to production activities

Ⅳ　Others

Stone tidal weirs

合計

232

Table 1.Aggregation of Underwater Cultural Heritage of the Ryukyu Island. (C. Katagiri)

Sites due to the Marine Accidents
Shipwreck sites (a): Often only the wreckage and pieces of ships found. They are
disturbed by natural phenomena like a typhoon or human disturbance like recovery after
having been stranded or sunk. Seabed artifact scattering sites (b): Generally formed by
loads thrown away from the ships, but sometimes caused by the wreck. Hard to
distinguish either unless wrecked hull pieces are found.
Sites formed by the Frequent Use of the Sea and Coastal Areas
Ports(c): Proving that the area had been used as a port, with anchors and artifacts of
various periods are found. Occasionally formed by the ship anchored there which
accidentally sunk? Coastal artifact scattering sites (d): Formed as a result of utilization
of the coastal area those who were living in the settlements there, such as cooking and
discarding which are distinguished from the ports.
Sites due to Production Activities
Found in the tidal zone. Quarries (e) are well-recognized and well-preserved while salt
pans(g) and stone tidal weirs(f) formed with the small pebbles piled are not preserved in
a good state. Such structures are meant to be constantly used and repaired, and will be
naturally destroyed once stopped being used. Many sites of this kind had been existed
3

�in the past, but the numbers dramatically decreased and hardly seen now. It is exigency
to record those sites.
Others
Artifacts that used to be on the seabed are often recovered on land and conserved as
cultural properties (h). Stone and iron anchors often apply to this case providing the clue
to the identification of the ships sailing in the area at that time.
Major characteristics of Underwater Cultural Heritage in the Region
Table 2 shows an overview of typical underwater cultural heritage in the Ryukyu
Archipelago and Fig. 2, Representative underwater cultural heritage of the Ryukyu
archipelago.
Underwater Cultural Heritage Related to Overseas Trades during the Gusuku
Period (between the 12th and 13th Centuries AD)
The

Amamioshima-kurazaki

underwater site (Fig. 2, Table 2, Site
No. 2, Ukenson Board of Education,
1999)

and

the

Kumejima-

nakanohama underwater site (Fig. 2,
Table 2, Site No.13, Miyagi et al.,
2004; Tezuka et al., 2005; Katagiri,
2007) are known to be holding
underwater cultural heritage formed
by

the

shipwreck

or

the

load

discarded from the ship, dated back
to the latter half of the 12th century to
the 13th century. In both cases,
Chinese ceramics are densely found
on the seabed, which provide a great
deal of information related to the
trading in the early Gusuku Period.

Fig. 2Representative Underwater Cultural Heritage of the
Ryukyu Archipelago. (C. Katagiri)

4

�Underwater Cultural Heritage Related to Overseas Trade from the Sanzan Period
(the 14th Century AD) to the Ryukyu Kingdom Period (from 1429 AD to 1879)
From the latter half of the 14th century to the beginning of the 15th century, a crucial
turning point in the history of the region occurred regarding the transition of political
power when the sovereign was centered during the establishment of the Ryukyu
Kingdom. Ohajima Underwater site in Kumejima Island is one of the major sites during
this period (Fig. 2, Table 2, Site No.12, Miyagi et al., 2004; Tezuka et al., 2008; Katagiri,
2007). Large amount of celadon of the early Ming Dynasty China is found. Moreover, 2
Chinese stone anchors have been identified in Kumejima Island. Kumejima Island and
the surrounding sea area must have played a significant role in oversea trades during
the early Gusuku Period and Sanzan Period, proved by the density of underwater sites
and stone anchors dated back then.The Ryukyu Kingdom was in its heyday from the
15th century to the mid 16th century. The king resided in Shuri-jo Castle served as the
sovereign ruler and the centralized nation was formed then. Nagura-shitadaru site
(Underwater site) dated back to the mid to late 15th century is located in Ishigakijima
Island and large amount of Chinese celadon discovered from the site (Fig. 2, Table 2,
Site No. 22, Sakishima Culture Research Institute, 2009). Miyakojima Island holds
Kurimajima Underwater site dated back to the first half of the 16th century. Chinese
ceramics found from sites has been changing then, from the predominantly celadon
before to the gorgeous flowery blue and white porcelain (Fig. 2, Table2, Site No.19,
Katagiri, 2009).After the invasion of the Satsuma clan in 1609, Tokara-retto Islands
became a territory of Satsuma. An underwater sites indicating the maritime accident at
that time is identified in Tairajima Island of Tokara-retto Islands. Clusters of Chinese
porcelains of the Qing Dynasty dated to the 18th century found in the area, which would
have been formed by the ship sunken or the ship loads discarded (Fig. 2, Table 2, Site
No. 1, Kagoshima University, The Faculty of Law, Economic and Humanities et al.,
2010).
Sunken Shipwrecks Revealing Ikoku-sen (the Western Ships) during the Last
Years of the Ryukyu Kingdom
In the last years of Ryukyu Kingdom, many West European ships called Ikoku-sen has
constantly been around the sea area of the Ryukyu Archipelago.It is obvious that Asian
5

�intrusion and interference by the great powers of the West Europe came to influence so
far as the Ryukyu Kingdom. Many shipwrecks found in the area can provide us the
great deal of information on Western ships at that time. An English ship, Providence,
sunken in Yaebishi in Miyakojima Island in 1776 was discovered (Fig. 2, Table 2, Site
No.16, Katagiri, 2009). On top of the Providence, another English ship, Indian Oak,
owned by East India Company sunken in 1776 was found in Chatan-cho in Chatan Oki
(Fig. 2, Table2, Site No.9, Nakamura, 1994). In 1853, the same year with when Mathew
Calbraith Perry arrived at Uraga Port, an English ship sank off Yoshino Kaigan in
Miyakojima (Fig. 2, Table 2, Site No.20, Katagiri, 2009) and a Dutch Ship, Van Bosse off
Takada Kaigan in Taramason Village in 1857 (Fig. 2, Table 2, Site No.21, Katagiri, 2009).
In 1872, when the Ryukyu Kingdom was inclining on verge of collapse, an English ship,
Benares sank off Ginama in Kunigamison Village (Fig. 2, Table2, Site No.4, Katagiri,
2013), as well as a foreign ship of unknown nationality sank off Minamiukibarujima in
Uruma City (Fig. 2, Table 2, Site No.8, Katagiri, 2010). Wrecks and loads left by those
foreign ships still remain on the seabed of those areas.
Underwater Cultural Heritage Related to the Domestic Commodity Circulation
within the Ryukyu Kingdom.
In 1879, the Meiji Government abolished the Ryukyu Kingdom. The Kingdom became
extinct on the map and came to be called “Okinawa Prefecture”. The ships called
“Maran-sen” were playing significant role of carrying the supplies to many remote
islands in Okinawa at that time. Agonoura Underwater site located in Zamamijima Island
(Fig. 2, Table 2, Site No.11, Miyagi et al., 2004), Yaebisi Underwater site Cluster in
Miyakoshoto Islands (Fig. 2, Table2, Site No.2-3, Katagiri, 2009), Yarabu Underwater
Site in Ishigakijima Island (Fig. 2, Table2, Site No.23, Katagiri, 2010, Ono et al., 2013),
Sekiseishoko Underwater site Cluster in Yaeyamashoto Islands (Fig. 2, Table 2, Site
No.24-26, Katagiri, 2009, Ono et al.,2013) are so far identified underwater sites dated to
this period. A wide variety of Tsuboya-yaki pottery produced in Naha City in
Okinawajima Island are found in those sites, accompanied with some Chinese Qing
Dynasty Porcelain in some cases. Those sites and artifact scatterings were formed due
to the accident of the ships which were transporting pottery produced at Tsuboya in
Naha City of Okinawajima Island to the smaller islands around Okinawajima Island,
6

�such as Miyako and Yaeyama Shoto Islands, either by the hull being submerged or the
loads abandoned on their way. In case of Sekiseishoko Underwater site Cluster, Point
No. 3 (Fig. 2, Table 2, Site No. 26), the submerged hull is identified. Moreover, fourarmed anchors that had never seen on land in Okinawa are discovered at Yarabu
Underwater site (Fig. 2, Table 2, Site No. 23) in Ishigakijima Island, which provides us
significant information to reveal the appearance and characteristics of the ships at that
time (Katagiri, 2010; Ono et al., 2013).
Submerged Port Sites
Underwater sites showing evidence of having been the ports with frequent use are
Shirasegawakako (Fig. 2, Table 2, Site No.14,
Toma and Sakuda, 1999) and Majako (Fig. 2,
Table 2, Site No.15, Katagiri, 2007; 2010) in
Kumejima Island, Agonoura in Zamamijima
Island (Fig. 2, Table 2, Site No. 11, Katagiri,
2007),

Sesokojima

Underwater

site

in

Motobucho of Okinawajima Island (Fig. 2, Table
Fig. 3 Landscape of Ohajima Underwater 2, Site No. 7, Katagiri, 2005). Majako Port had
Site (A Large Amount of China Ceramics
of the Late 14th on the Seabed) and Sea been a famous port known to be used for
Area that Held a Tour. (C. Katagiri)
tributary trades. There is a warehouse overseer

near the site and stone anchors are found from the nearby settlement. A wide variety of
artifacts dated back to from the medical to pre-modern and modern period are scattered
on the coast and seabed in this area, which support that the area had long been used
as a port (Fig. 2, Table 2, Site No.15). Combined investigations of such a site and
previously mentioned Nakanohama underwater site and Ohajima underwater site that
show the traces of maritime accidents will provide us with large amount of information to
evaluate the site. Agonoura of Zamamijima Island is also known as a port related to the
tributary trade.Many kinds of artifacts, such as the 15th century celadon, as well as the
pre-modern and modern pottery produced in Okinawa, have been discovered on the
seabed of the area (Fig. 2, Table 2, Site No.11).
Sesokojima Sea area had also long been used as port on the trade route, which
resulted in many artifacts findings especially on the east coast of Sesokojima Island. A
7

�stone anchor was found at Anchi-hama Beach, probing the existence of the ships
anchored there (Fig. 2, Table 2, Site No.7, Katagiri et al., 2005). This stone anchor is
relatively small, but mocking Chinese stone anchor having produced during the time of
the Ryukyu Kingdom. The small stone anchors of this kind have recently been found at
several places all over Okinawajima Island, which would be significant information
source to reveal the structure of Maran-sen ships. Several stone anchors of this kind
holding similar form were also found from the seabed off Sanko Port of Tokunoshima
Island (Fig. 2, Table 2, Site No.3, Kagoshima University, The Faculty of Law, Economic
and Humanities et al., 2010). The area was tactically significant sea area for the port,
and geographical as well as historical significance of the area are to be revealed.
Production Site
Production

sites

are

generally

recognized in the tidal zones. Quarries,
stone tidal weirs and salt pans are the
representative sites of this kind. A huge
quarry

in

Kumejima

Island

of

Kumejimacho (Fig. 2, Table 2, Site
No.28, Katagiri, 2006), stone tidal weir
cluster

in

Kohamajima

Island

of

Taketomicho (Fig. 2, Table 2, Site
Fig. 4 Tour scene of the Snorkel in Ohajima No.29, Katagiri, 2009), a salt pan in
Underwater Site. (C. Katagiri)

Nakijinson Village of Okinawajima Island
and the like are so far identified (Fig.2, Table 2, Site No.31). Quarries are often well
preserved due to its structural characteristic, while stone tidal weirs and salt pans made
with small pebbles pile up are generally in disastrous preservation state. These types of
sites have to be constantly used and repaired. The site, once stopped being used,
would start to be reverted back to the original natural state and collapse due to the
natural force of waves and tide. There had been many salt pans and stone tidal weirs in
the past, which are hardly seen now. Recording of those sites is our urgent mission.

8

�No.

Underwater Site

Location

Classification

Contents

Age

1 Tairashima

Tokara, Tairashima

Ⅰb

Boat cargos, China Ceramics

18th

2 Kurakizaki

Amami, Amami Oshima

Ⅰb

Boat cargos, China Ceramics

12-13th

3 Sankou

Amami, Tokunoshima

Ⅱc

Port. Stone anchor

Middle Ages

4 Ginama

Okinawa, Okinawajima

Ⅰa

Wreck. UK, Benares

1873

5 Emons

Okinawa, Okinawajima

Ⅰa

Wreck. USA, Emons

1945

6 Wajikaigan

Okinawa, Iejima

Ⅰb

Boat cargos, China Ceramics

15th
Middle Ages -Modern

7 Sesokojima

Okinawa, Sesokojima

Ⅱc

Port. Okinawa stone anchor,
China Cermaics, Okinawa Pottery

8 Minamiukibarujima

Okinawa, Minamiukibarujima

Ⅰa

Ｗｒｅｃｋ

1876

9 Indian Oak

Okinawa, Okinawajima

Ⅰa

Wreck. UK, Indian Oak

1840

10 Nahakou

Okinawa, Okinawajima

Ⅱc

Port. China Cermaics

Middle Ages-modern

11 Agonoura

Okinawa, Kerama, Zamamijima

Ⅱc

Port. China Cermaics, Okinawa Pottery

Middle Ages-modern

12 Oha

Okinawa, Kumejima,Ohajima

Ⅰb

Boat cargos, China Ceramics

Late14th

13 Nakanohama

Okinawa, Kumejima, Hatenohama

Ⅰb

Boat cargos, China Ceramics

12-13th

14 Sirasegawakakou

Okinawa, Kumejima

Ⅱc

Port. China Cermaics, Okinawa Pottery

Middle Ages-modern

15 Majakou

Okinawa, Kumejima

Ⅱc

Port. China Cermaics, Okinawa Pottery

Middle Ages-modern

16 Yabiji,No.1

Sakishima, Miyako, Yabiji

Ⅰa

Wreck. UK, Providence

1776

17 Yabiji,No.2

Sakishima, Miyako, Yabiji

Ⅰb

Boat cargos, Okinawa pottery

Early modern period

18 Yabiji,No.3

Sakishima, Miyako, Yabiji

Ⅰb

Boat cargos, Okinawa pottery

Early modern period

19 Kurimajima

Sakishima, Miyakojima, Kurimajima

Ⅰb

Boat cargos, China Ceramics

Early16th

20 Yoshinokaigan

Sakishima, Miyakojima

Ⅰa

Wreck. UK

1853

21 Takadakaigan

Sakishima, Taramajima

Ⅰa

Wreck. Netherlands, Van Bosse

1857

22 Nagurashitadaru

Sakishima, Ishigakijima

Ⅰb

Boat cargos, China Ceramics

15th
Early modern period

23 Yarabu

Sakishima, Ishigakijima

Ⅰb

Boat cargos, Okinawa pottery.
Four claw iron anchor

24 Sekiseisyouko,No1

Sakishima, Sekiseisyouko

Ⅰb

Boat cargos, Okinawa pottery, China Ceramics

Early modern period

25 Sekiseisyouko,No2

Sakishima, Sekiseisyouko

Ⅰb

Boat cargos, Okinawa pottery

Early modern period

26 Sekiseisyouko,No3

Sakishima, Sekiseisyouko

Ⅰa

Wreck. Okinawa pottery

Early modern period-modern

27 Yomitanson,quarries

Okinawa, OKinawajima

Ⅲe

Production sites. Quarries

Early modern period-modern

28 Kumejima,kitahara,quarries

Okinawa, Kumejima

Ⅲe

Production sites. Quarries

Early modern period-modern

29 Kohamajima,stone tidal weirs

Sakishima, Kohamajima

Ⅲf

Production sites. Stone tidal weirs

Early modern period-modern

30 Iriomotejima,stone tidal weirs

Sakishima, Iriomotejima

Ⅲf

Production sites. Stone tidal weirs

Early modern period-modern

31 Wakugawa,soltworks

Okinawa, Okinawajima

Ⅲg

Production sites. Soltworks

Early modern period-modern

32 Amami Oshima,stone anchors

Amami, Amami Oshima

Ⅳh

8China stone anchors

Middle Ages

33 Uegusuku,stone anchor

Okinawa, Kumejima

Ⅳh

China stone anchor

Middle Ages

34 Yamadagusuku,stone anchor

Okinawa, Okinawajima

Ⅳh

China stone anchor

Middle Ages

35 Taramajima,stock anchor

Sakishima, Taramajima

Ⅳh

Western Europe Stock anchor

Early modern period

36 Yoshino,stone material

Sakishima, Miyakojima

Ⅳh

Stone material

Early modern period

37 Ikema,Iron products

Sakishima, Miyako, Ikemajima

Ⅳh

Iron products

Early modern period

Table 2.Overview of Typical Underwater Cultural Heritage in the Ryukyu Archipelago. (C. Katagiri)
9

�Underwater Cultural Heritage Raised on Land
There are some artifacts and parts of ship structure, which had been found on the
seabed, raised on land, and then preserved and reverted to the cultural properties.
Their information and use would be enhanced and its value increased by being
connected with underwater cultural heritage in the area that still remains to be
underwater. A stone anchor reused for the well of a Yamada Gusuku (Castle) in
Onnason Village (Fig. 2, Table 2, Site No.34, Katagiri, 2007), iron anchors in
Taramajima Island (Fig. 2, Table 2, Site No.35, Katagiri, 2009), stone materials found in
Yoshino Settlement in Miyakojima Island (Fig. 2, Table 2, Site No.36, Katagiri, 2009),
iron products of Miyako-Ikemajima Island and the like are so far recognized of this kind
(Fig. 2, Table 2, Site No.37). They provide us the clue to figure out the ships sailing in
this sea area.
Experimental Site Open Day
After the 10 years of distributional survey in sea area of the Ryukyu Archipelago, as a
result, we now have a rough idea about the types and quantity of underwater cultural
heritage in the area. The next step forward is to search for a method for protection and
utilization of such cultural heritage bore in the beautiful sea in this region with high
degree of transparency formed by coral leaf. For this purpose, we have experimentally
undertaken a public site open day for underwater cultural heritage around Kumejima
Island in Kumejimacho (Katagiri et al., 2012).
Fig. 3 shows Landscape of Ohajima underwater site and sea area that held a tour.The
major attraction of the day was Ohajima Underwater Site with dense distribution of
Chinese pottery dated back to between the latter half of the 14th century and beginning
of the 15th century. For the better understanding of the nature and characteristics of
underwater cultural heritage, we had delivered a preliminary lecture for 30 minutes
before the site visit, as well as observation tour of the artifacts already raised on land,
such as pottery pieces collected from the seabed at Ohajima and a stone anchor found
at UeGusuku (castle) for 30 minutes. Furthermore, we organized a tour visiting related
cultural heritage sites on land, such as Tenkogu Site, Kuramoto-ato Site, Majako Port
Site, quarries, and the like, for an hour, which aimed at explaining why the underwater
site had been formed on seabed of Ohajima. We prepared 2 ways to visit for the actual
10

�visit of Ohajima Underwater site on seabed, both of which last for about an hour. We
organized 2 groups of people with 20 people each, one for visiting the site by snorkeling
and the other by a glass-bottom boat for those who are not willing to go into the water.
Fig. 4 shows the tour scene of snorkel in Ohajima Underwater Site. This attempt was
able to establish a model case for the site open day for the public visiting underwater
cultural heritage, which could be followed by the other sites in the Ryukyu Archipelago
although we still have to scrutinize this case to evaluate how far the case can be applied
to the other cases as well as to the wider public.
Conclusion
History and culture of the Ryukyu Archipelago have long been together with the sea.
Due to its few resources and small areas, it is often claimed that island areas provide
harsh environment for the life and survival of human-being. Nevertheless, there is a
distinctive maritime culture which have overcome and formed till now. The distinctive
characteristics and history of such culture has not yet been fully revealed and evaluated
even now. It needs further investigations. We believe that study of underwater cultural
heritage would be essential field of research for the future of this area around the
Ryukyu Archipelago. The researches so far done helped us to identify a wide variety of
underwater cultural heritage ranging from the medial to the pre-modern and modern
period. It is also found out that most sites tend to be related to the trade, port and
production activity. Now, after the distributional survey, further intensive investigation
on a particular area needs to be carried out. Even though we are still facing many
problems for conservation and utilization of the site, utilization of underwater cultural
heritage in the Ryukyu Archipelago has a bright future, we believe. Many people from all
over the world visit Okinawa to enjoy the observation of the seabed of the area by
marine sports and glass-bottom boats. As it has been undertaken in Kumejima Island,
the concept of establishing Seabed Site Museums is ideal way of utilization for such
environment with beautiful sea in the Ryukyu Archipelago. We further intend to promote
this attempt to the other sea area.
Acknowledgements
We are most grateful to Prof. Akifumi Iwabuchi of Tokyo University of Marine Science
and Technology for giving us such a great opportunity to present this paper at APCONF
11

�as a session organizer, as well as to Dr. Tatsuya Nakata of Tokyo University of Marine
Science and Technology for very useful advice. Also wish to thank Director Kenzo
Hayashida of the Asian Research Institute of Underwater Archaeology, Mr. Hiroki
Miyagi of Nago City Board of Education who worked on the research project at the
Ryukyu Archipelago with us, Prof. Yoshiro Watanabe of Kagoshima University, and all
other friends who worked together.
References
Asian Research Institute of Underwater Archaeology (Ed.), 2012. The Database of
Underwater Cultural Heritage and Promotion of Underwater Archaeology: Nansei
Islands. The Asian Research Institute of Underwater Archaeology, Fukuoka (in
Japanese).
Kagoshima University and Nansei Islands Underwater Cultural Heritage Study Group,
2010. The Report on Underwater Cultural Heritage around the Nansei Islands in Fiscal
2009. The Journal of Underwater Archaeological Studies, Vol. 3:5-31 (in Japanese).
Kagoshima University and Nansei Islands Underwater Cultural Heritage Study Group,
2011.The Report on Underwater Cultural Heritage around the Nansei Islands in Fiscal
2010. The Journal of Underwater Archaeological Studies, Vol. 4: 36-59 (in Japanese).
Katagiri, C., Higa, N., and Sakihara, T., 2005. A Stone anchor found underwater near
the Anchi Beach in Sesoko Island, Motobu-cho. Bulletin of the Museum, Okinawa
Prefectural Museum and Art Museum, Vol.3: 61-70 (in Japanese）.
Katagiri, C., (Ed.), 2007. Distribution Survey Report of the Coastal Sites (I) – Volume
on Okinawa-honto and Surrounding Islands. Okinawa Prefectural Archaeological
Center, Naha (in Japanese).
Katagiri, C., (Ed.), 2009. Distribution Survey Report of the Coastal Sites (II) – Volume
on Miyako of Yaeyama. Okinawa Prefectural Archaeological Center, Naha (in
Japanese).
Katagiri, C., (Ed.), 2010. Distribution Survey Report of the Coastal Sites (III) – Site
Map Volume. Okinawa Prefectural Archaeological Center, Naha (in Japanese).
Katagiri, C., 2011. Attempt of Discovering Underwater, In Miyakojima City Board of
Education (Ed.) Report on Management Plan of Nationally Designated Place of Scenic
Beauty “Higashihennazaki”: 163 -168, (in Japanese).
Katagiri, C., Miyagi, H., Arakaki, T., Yamamoto, Y., and Watanabe, M., 2013. Research
Studies of Ginama Foreign Shipwreck sites in Kunigamison, Okinawa, Japan. Bulletin of
the Museum, Okinawa Prefectural Museum and Art Museum, Vol.6: 31-53 (in Japanese).
Katagiri, C., Yamada, H., Sakihara, T., Nakajima, T., Miyagi, H., and Watanabe, Y.,
2012.The Report of an Underwater Cultural Heritage tour in Kumejima- The Project of
‘The Museum of Underwater Cultural Heritage’. Bulletin of the Museum, Okinawa
Prefectural Museum and Art Museum, Vol.5: 19-36(in Japanese).
12

�Miyagi, H., Katagiri, C., Arakaki, T., and Higa, N., 2004. Preliminary investigation into
discovering sunken ships in the Southwest Islands: Underwater artifacts and marine
transportation. Bulletin of the Archaeological Study of Okinawa, Vol. 2: 43-60 (in
Japanese).
Miyagi, H., Katagiri, C., Higa, N., and Sakihara, T., 2005. Preliminary investigation into
discovering sunken ships in the Southwest Islands (II): Underwater artifacts and
marine transportation. Bulletin of the Archaeological Study of Okinawa, Vol. 2: 81-108
(in Japanese).
Nakamura, S., 1994. Stranded site of Indian-Oak. In Chatancho Board of Education
(Ed.), Chatancho no Iseki, p. 22 (in Japanese).
Ono, R., Katagiri, C., Sakagami, N., Kan, H., Miyagi, H. and Yamamoto, Y., 2013
Present and future of the Underwater Cultural Heritages in the Yaeyama Islands:
Perspective from the recent research of Yarabuoki, Proceedings of Yaeyama Museum,
Vol. 22: 20-43 (in Japanese).
Sakishima Culture Research Institute (Ed.), 2009.Report of the Joint Research Project
on Nagura Shitadaru Underwater Site. Sakishima Culture Research Institute, Ishigaki
(in Japanese).
Tezuka, N., (Ed.), 2005.Structural Analysis of Traded Ceramic Production and Demand
in Medieval Japan, Nakano-hama Beach in Kumejima Island, Okinawa, Fiscal 2003.
Research Report. Aoyama Gakuin University College of Literature Department of
History, Tokyo (in Japanese).
Tezuka, N., (Ed.), 2008.Structural Analysis of Traded Ceramic Production and Demand
in Medieval Japan, Nakano-hama Beach in Kumejima Island, Okinawa, Fiscal 20062007 Research Report. Aoyama Gakuin University College of Literature Department of
History, Tokyo (in Japanese).
Toma, S., and Sakuda, I., 1999. The remains Collected at the Mouth of the Shirase
River in Kume Islands. Bulletin of Culture Division Education Department Okinawa
Prefectural Government, No.15: 25-32(in Japanese).
Ukenson Board of Education (Ed.), 1999.KurakizakiKaitei Underwater Site.(in
Japanese).
Watanabe, M., 2009. Report 1, Research Report on Underwater Heritage in Nansei
Islands Vol. 6, document research Fiscal 2009. The Journal of Underwater
Archaeological Studies, No.3: 28-29 (in Japanese).
Biography
Chiaki Katagiri is the chief curator of the Okinawa Prefectural Museum and Art
Museum. He was born in Nagano, Japan in 1976, graduated from Okinawa
International University in 1999 majoring in archeology. From 2000 to 2011, he worked
as a Specialist in Okinawa Prefectural Archaeological Center and appointed to current
post in 2011. He is specializing in anthropology of the islands, carrying out
anthropological and archaeological fieldwork throughout Asia. He has been actively
13

�engaged in investigation and research of underwater cultural heritage in Ryukyu
Archipelago. His papers include Research Studies of Ginama Foreign Ship Wreck Sites
in Kunigamison, Okinawa (2012).
Yuji Yamamoto is an underwater photographer participating in several projects by
Asian Research Institute of Underwater Archaeology, as well as many other underwater
heritage projects. Having graduated from Fukuoka University, he was taking pictures of
Paris-Dakar Rally and F-1 races. He has participated in the investigation of Takashima
Underwater Remains since 1998 and successfully photographed parts of the ship hull,
tetsuhau, a helmet, the bundle of arrows of Mongolian Invasion discovered in muddled
water. His pictures are published serially in the diver’s monthly magazine “Gekkan Diver”
since 2014.
Yumiko Nakanishi is an archaeologist working at Osaka Prefectural Government. She
obtained M.Phill in Archaeology at Cambridge University in 2001 and is currently a PhD
candidate, specializing on heritage management and public archaeology, as well as the
final phase of Kofun Period in Kinki region of Japan. She is an Expert Member of
ICOMOS Committee for Archaeological Heritage Management (ICAHM). Her publication
includes, Theory and praxis of Cultural Heritage Studies in England, Journal of Heritage
Studies, Vol. 1: 47-5; The Great East Japan Earthquake and cultural heritage: towards
an archaeology of disaster, Antiquity, Vol. 87: 258-269.

14

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                  <text>Dr. Akifumi Iwabuchi</text>
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                <text>Distributional Survey of Underwater Cultural Heritage and its  Experimental Presentation in the Ryukyu Archipelago </text>
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                <text>The Ryukyu Archipelago is located at the northwestern Pacific, between the islands of Formosa and Kyushu of southern Japan. It consists of 199 islands of all dimensions and the total range of its accurate distribution lengthen is approximately 1,200 km. Since the first human beings settled down on the archipelago during the Pleistocene, they have been living close by the sea there.  The local populations have recognized maritime resources as a main and important nutritious food since the prehistoric era, while the Ryukyu kingdom used to be prosperous unprecedentedly in terms of seaborne oversea trade among Japan, China, and Southeast Asia.  In the Ryukyu archipelago, the distributional survey of underwater cultural heritage has lately been conducted by the Nansei Islands Underwater Cultural Heritage Study Group, the Okinawa Prefectural Archaeological Center, the Asian Research Institute of Underwater Archaeology, and Kagoshima University, in order to assess its numbers, typologies, actual conditions, and so on.  According to the research, 235 sites of underwater or maritime cultural heritage have already been confirmed: 9 shipwrecks, 33 submerged ports, 15 places where boat cargos are scattered on the seabed, 72 places where old boat cargos and other remains are found along the coasts, 30 stone anchors and cargos on land, 28 quarries, 45 stone tidal weirs, and 3 salt works. In 2011, as a result of the survey, an underwater cultural heritage presentation or guidance tour was carried out in Kume Island.  Presumably, this experimental trial will lead the public to having the sense to acknowledge and protect underwater cultural heritage in the future.</text>
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                    <text>The Naval Architecture of Ancient Fujian Style Sea Going Sailing Junks:
A Manuscript

Xu Lu
Chinese Sailing Junk Expedition Society
Xiamen, 361003
People’s Republic of China
Email: xuluxm2013@yahoo.com
Abstract

As the most important qualities of ancient Chinese sailing junks, the square bows and
sterns with transverse watertight bulkhead and the lugsails with bamboo mat and strip
remained the same over thousands of years. Of which, the traditional Fujian style sea
going junks is one of the major vessel forms for the ocean and oversea route in ancient
China. This paper make an interpretation of Fujian style sea going junks through ship
form and structure, principle of design, models, choice of material, sequence of
construction, painting and decoration, tools, ship-builders, and ship component remains.
This study is combined with the interpretation of Chinese historical documents and
drawings, foreign historical drawings, ethnographical field work on main traditional
shipbuilding centers along the Fujian coast, reconstruction of traditional shipbuilding,
land archaeology evidence, and especially gathers information from a newly discovered
illustrated manuscript for shipbuilding. This manuscript at present is the most detailed
manuscript found pertaining to the principle of design, modulus system, main unit data,
measures and amounts materials used for each ship form. The purpose of this paper is
to recover the historical archetypes of ancient Fujian Style Sea going sailing junks, then
providing one set of helpful method to explain and identify relevant ship remains
excavated in future shipwreck underwater archaeological projects.
Keywords: Fujian style Sea going junks, Traditional shipbuilding, Ship remains, Naval
architecture, Manuscript

Introduction
The traditional Fujian style sea going junks is one of the major vessel forms in ancient
China. But, what did that ancient junks look like? How were they made? How were they
operated and maneuvered? China’s navigation and naval architecture constitute a
history of this production technology with its root in the common people. Extant
historical data is rather limited and therefore regrettably slight when contrasted with the
1

�art and expertise accumulated over time and the ancient and magnificent culture that it
represents. The emergence of sea-faring wooden vessels, their development,
transformation and eventual disappearance had a lot to do with the political and
economic conditions as well as the available natural resources at any specific time.
Without question, changes in available resources as well as in sea routes entailed
modifications to form, size, function, names, and even the mode of operation of these
vessels. Equally, the technological development and improvement in ship design had its
effects on society and the subsequent trajectory of social history. Before, domesticated
shipwreck archaeology was founded in the matching and displaying of wrecks, and
never went further to carry out experiments on replica and reconstructions according to
ancient navigation environment perspectives.

Even after researching into the history of naval architecture and ancient writings,
searching through relics from different dynasties, focusing mainly on the general
conditions of ship-building and the wide variety of methods of manufacturing through
every historical period, we are still unable to reconstruct history in its entirety. What
could be done was to set up a systematic way of collecting data; then to summarize,
understand and subsequently experiment with them. With this data as the foundation,
the project became to produce a series of replicas using methods of construction that
had been passed down from generation to generation, so that people today can see
and experience them; replicas that may allow later generations to reconstruct actual
history. Only by doing so can we answer the three questions pertaining to ship-building
and sea-faring history listed above, an only then can the value of research be made
clear.

Ship Form and Structure of Fujian Style Junks
Facing Taiwan across the strait, Fujian has 3,324 km of coastline and 1,404 small
islands off the coast. The way of life of the ancient Yue people, Fujian’s early
inhabitants, was sea orientated with sea travel as their main means of communication.
Despite the hilly landscape and mountain ranges in Fujian’s hinterland, these proved no
barrier to its economic interaction with other provinces and places overseas (Fig. 1).
2

�The inland, inshore and offshore sea-faring
networks linked Fujian with the outside
world

thereby

shipping
continuously

ensuring

and

that

fishing

developed.

Fujian’s
industries

In

addition,

Fujian was rich in natural resources such
as wood, iron, tong oil (Verniciafordii seeds
oil), lihui (lime obtained by burning oyster
shells), rattan, hemp and lacquer. With
such handy materials that could be used to
build ships, ship-building prospered across
the province. Viewed from a different
perspective, Fujian’s coastline was full of
Fig. 1 A Color Images of Fujian Style War Junk. (W. creeks and inlets. Facing the Strait of
Alexander)

Taiwan, it was situated where warm and

cold air currents mingled. Not only was the wind strength very inconsistent, it was also
where typhoons move inland from the sea during the summer and autumn. Due to this
complicated natural environment, certain demands had to be met with regard to form,
function and structure of ships, and to the choice of materials and skills employed in
their manufacture. It is such circumstances that gave birth to vessels with V-shaped
bottoms, raised flat bows, indented sterns, flaring bulwarks, framing, stern-hung, lifting
rudders lowering deeply below the keel line, and wide cambered decks that eased the
drainage of water. These unique environmental and cultural factors together made the
Fujian style junks one of the major vessel forms in ancient China.
Building Fujian style junks required standard procedures in the choosing of ship form,
design, materials and construction strategy, and involved manufacturing processes
such as carpentry, metal work, sewing, painting and smelting. The Southern Song
dynasty seagoing ship unearthed in Houzhu in Quanzhou in 1974, the mid-Yuan
dynasty Fujian merchant ship discovered in Xin’an of Korea in 1982, and the many
ships found in the sea-beds in Lianjiang, Pingtan, Putien and Dongshan in Fujian
province are comprised solely of those parts of the ships that were below the waterline.
3

�Therefore, they provide no information on the complete form and design of these
vessels. These remains, however, do prove that during the Song and Yuan dynasties
the necessary skills developed to build the three-sectioned keel, the water-tight cabins
and stern-hung rudders that could be hoisted and lowered.
Historical Evidence
The earlier records from extant historical writings that contain information on different
types of ship from the Fujian style junk series were written around the late 16th to the
mid-17th century. A middle 17th century collection of the Berlin Ethnologic Museum was
the earliest meticulous color image of Fujian style junks (Anonymous, mid-17th Century).
A mass of Drawings of Chinese ship anchored around Matsuura and recorded by local
Japanese painters since last decade of 17th century (Oba, 1972) were of great value for
study. In 1796, William Alexander’s colour images are the earliest and the best realistic
portrayals of Fujian style junks available to us today (Fig. 2).
Domestic sources were researched as
well. The Navy Abstract, written in the year
of the Emperor Kangxi (1654-1722) by the
regional commander Chen Liang Shi
contained an iconography for Fujian style
warship (Chen Liang Shi, 2002).

The

Taiwan Conversation by Writing, written
between the years of the emperor Kangxi
to

Yongzheng

by

Huang

Shu

Jing,

recorded parts of materials, quantities and
specifications

needed

to

build

the

Ganzeng types of Fujian warship (Huang
Shu Jing, 1957). The Illustrated Manual of
Instruction in Shipbuilding for the Navy of
Fujian Province, a manuscript between the
years of the emperor Yong zheng to
Fig. 2 The Coast of Fujian Province and the Qianlong by anonymous writer recorded
Location of Sha Po Wei. (Xu Lu)
by the order of the Admiralty (Anonymous,
4

�Mid-18th
listed

Century),

the

kinds

of

warships in use during
that time. Types like
Ganzeng, Shuangpeng,
Pingdi, Fazhuo, Bajiang
were listed, and their
peculiarities and used
for different areas and
condition. The Regions
Formula of Fujian Sea
Going
Fig. 3 The Old Dockyard in Sha Po Wei inside Xiamen Gang. (Xu Lu)

Warships,

a

woodblock edition was

written in 1768 by the order of the emperor Qianlong (Anonymous, 2002). Through
putting together mostly-forgotten information that have been scattered all over the world,
the appearance and design of junks traceable to the Song and Yuan dynasties are
visualized. These sources show wahat ancient Fujian style sea-going junks probably
looked like.
Ethnographical Field Investigation and Manuscripts
From 2004, we began to visit the main traditional shipbuilding centers along the Fujian
coast and carried out the field investigation of wooden sailing junks. We found 7
manuscripts recorded and inherited by 4 shipwright families. The Sha Po Wei inside
Xiamen Gang (Old Amoy Port) is a famous traditional shipbuilding center up to the first
half of the 20th century. It was comprised of more than 15 private dockyards around 3
hectares of shoreline (Fig. 3). The Chen family in one of largest and oldest dockyards in
the region, the family migrating from Huian country to Xiamen Gang at least five
generations ago. An illustrated manuscript of naval architecture was archived by Mr.
Chen Yan Ning of this family. It is 51 pages of paper, 22.5 cm in length and 11cm wide,
6 vertical red lines to a page, badly written in the end of 1910s.The manuscript was
drawn by Chen Yan Ning’s uncle, Chen Guo Zai (died in 1949), and then his son gave it
to Chen Yan Ning. It contents size and cost of fourteen Fujian sea-going sailing junks,
5

�all the numbers expressed in Suzhou
numerals (Table 1). It is the most detailed
record so far pertaining to the principle of
design, modulus system, main unit data,
measures and the amount of materials
used for different ship forms. One of those
is Da Pa, a junk that each side of hull is
printed five gun ports (Fig. 4), it is the only
civil junk with gun ports in the period of
the Republic of China, alias Hei Bo or
Feng Wei Chuan by recorded of G. R. G. Fig. 4 The Manual of Da Pai in the Naval
Worcester (Worcester, 1948) (Fig. 5).

Architecture Manual of Chen’s Family. (Chen Guo
Zai)

Design
In ancient times, master ship-builders relied on their individual experience and the
knowledge passed down from previous generations. They would make patterns on the
spot rather than prepare drawings with precise dimensions in advance. Traditional shipbuilding was a conservative, physically demanding profession. Apprentices were people
from the lower end of society who could not afford an education. Being mostly illiterate,
ship-builders’ experience and knowledge was an oral tradition, passing it down to
apprentices as they worked. In those days livelihoods very much depended on such
skills, so what they learned they kept to themselves and seldom disclosed. For these
reasons, illustrated construction manuals were rare. When designing a new ship, Fujian
shipwright would decide on the measurements:



The length of the keel (longgu) and the rise at both ends based on the
intended use of the particular ship;



The location of the four main transverses – those at the front and back,
behind the mast and that which defines the main cabin;



The width and depth of the ship in proportion to the length of the keel
(longgu), for example, the measurement of the transverse behind the mast
should be 4/10 the measurement of the keel.

6

�

All other measurements such as the bottom-width of the transverse behind
the mast, the top and bottom widths and locations of other transverses were
then defined based on experience and according to the type, usage and
other requirements of the vessel.



The height of the mast depended on the top-measurement of the transverse
immediately behind. So was the size of the major sail.



Finally, measurements of width and the size and shape of the rudder post
and tiller were determined.

The earliest historical document about design of Fujian style junk that has been
discovered up to now is a document from the early Qing dynasty.

Fig. 5 Feng Wei Chuan. (G. R. G. Worcester)

Models
The building process started with making a model. Measurements would then be
proportionately enlarged for making the ship. This was a method recorded in documents
from the Song dynasty onward and continues to be used even in the present. Currently,
7

�scholars take the making of models as the means by which to conserve and record the
technology used to make a particular ship, but the ship-building industry knows well that
components are difficult to reduce and reproduce to scale. Hence details that scaled
down would be too small to show are often omitted.

Furthermore, to build a ship

requires totally different skills to those required for making a model. When detailed
plans and descriptions are lacking, models can at times be misleading. Model offered
the possibility of experimenting with various solutions before the replica in full scale was
begun.
Selection of Material
As far as the choice of wood is concerned, a kind of natural fir tree Cunninghamia
lanceolata (Lamb). Hook from Fujian a mountainous area was normally used for the
parts of a ship’s shell that have direct contact with the sea, such as the keel (longgu),
bottom, shuishe (literally water snake), and zouma (literally running horse), the deck
and transverses (gecangban, literally cabin-separating boards), and natural small-leaf
camphor for other parts of the body such as cangliangzhuo (base of cabin beams)
liangtou (beam-end) and gecangfuqiang (cabin-separating strengtheners). For the
rudder and anchor which required harder material, kundian wood, which was grown in
Guangdong and Southeast Asia was used. Wood for the mast was the most carefully
selected, natural fir trees from Fujian aged 80 or more were generally used. Extant
historical documents prove that tight rules governing the selection and quantity of
materials to be used for ships built in imperial shipyards existed from the mid Ming. The
allowances, however, seem overly lavish. With experienced folk ship-builders,
measurements of all the parts would be clear in their minds as they searched for
materials. Any piece of wood was to them an assembly of some parts. Ship-building
uses a lot of wood, but the availability of wood is subject to specific growth cycles. A
shortage of supply occurred in Fujian from the early Ming Dynasty, and with it, the cost
of ships went up. Wood was then imported in large quantities from Southeast Asia
(Chen Xi Yu, 1991). At the same time, some folk-shipyards moved out of Fujian. Some
relocated abroad where a few expanded to substantial size. With them Fujian shipbuilding technology spread overseas.

8

�Launched

1

2
3
4
5
6
7
8
9
10
11
12
13
14

1915
1914

Type

Owner

Da
Shuang Zhang
(Jiang)
Da Gu
Da Gu
Da Gu

Qiu Xiong

Da Pai
Da Pai
Da Pai
口 Cao
(DiaoCao？)

1906

Jin
Mu Chuan
Chong Wu Changshun hang
Chong Wu Cheng Chuan
Chong Wu Chang Shun
Xiu Chuan
Jiu Zhi
He Shang
Tou Chuan
De Bao

Shui Chuan

Length of
keel
(chi/meter)
28.4/8.72

Cost
(Silver
Dollar)
500

22.7/6.81
28/8.4
21/6.3
35/ 10.5
31.5/9.45
21/6.3
30.5/9.15
22/6.6
30.5/9.15
30.5/9.15
27/8.1
31/9.3
20/6

500

230

Table 1. The Contents of Fourteen Fujian Junks from the Naval Architecture Manual of Chen’s Family.
(Chen Guo Zai)

Sequence of Construction
Traditional production starts with establishing the keel (longgu), fixing transverses
(longuyiban, literally dragon bone wing-boards), parts of bottom planking, gecangban,
biban (bilge Keel), wen (stabilizer), lianggung (upper ribs), then the intermediate ribs
between the transverses, and finally, the remaining bottom planking. After these, work
on the weather deck begins. First the boards along the bulwarks, followed with shishe
on the exterior of the bulwarks, shuixianmen (literally narcissus door) and then the
bulwarks. The dragon-eye is usually installed on an auspicious day chosen by the
boatman. When the making of the ship’s hull is finished, the filling or Lihui (Caulking)
and all sewing work too come to completion. Before the new ship is launched, the
exterior of the shell is first covered with a mixture of rice soup and lihui to protect
against shipworms. The owner selects a date and time for the launching after which the
mast is set up and the sails bent on. This pattern of ship-building is traditional for many
9

�areas along China’s coastline and continues to be used even up to the present.
Scholars named it chuankefa, literally the Chinese frame first system. The modern
Chinese building techniques for large wooden ships begins with the keel, then erects
the frames or ribs and the bottom planking before completing the side planking. This
method of ship-building first appeared in Shi Ryukyu Lu (Diplomatic Mission to Ryukyu)
written by the Ming dynasty diplomat Xia ZI yang in 1606 (Xia Ziyang, 1970).
Painting and Decoration
That part of hull below the water-line is usually covered with baikehui (lime from white s
hells). The flares (tuolang ban, wave-lifting boards near the bow) are also first covered
with lime before painting the figure that characterizes Fujian junks with a solution made
of glue, tung oil and natural color pigments. Some Fujian junks even come with a carved
head of a lion at the bow. Dragon eyes on the bulwarks near the bow are usually made
of camphor. Particular rules govern the size and shape of these eyes: the ratio between
the keel length and eye should be 110:4; eyes for fishing boats should look downwards t
o signal the search for catches while eyes for merchant ships should look at the route a
head. Mulong (wooden dragon), i.e., loach poles (qiuyuji) are painted on the bulwarks n
ear the stern, a seabird (muyi) on the yingban (the oval-shaped sern facing), and at the
bottom of the yingban is the board which carries the ship’s registration number. Accordi
ng to legend, qiuyuji, muyi bird and Matsu (Goddess of the Sea) are the three treasures
that watch over the safety of ships. A statue of Matsu or a paper charm as its substitute
may be placed in a sanctuary in the after part of the poop.
Tools
Confucius says, “Good tools are a prerequisite to the successful completion of a job”.
For the execution of specific tasks, special tools are required, such as axes, chisels,
saws, files, tweezers, awls, knives, rulers and modou (ink markers) used by carpenters,
and hammers, large tweezers, sickles, paint-brushes, truncheons for working with lime
are used by other workers.
Axe: triangular in shape, the axe is the most important tool in ship-building. In traditional
ship-building, the qualification of ship-building masters is measured by the number of
years he has used an axe.
Adze: shaped like a hoe, it is also named guangfu (smooth-out, or faying axe) meaning
10

�that it is used for smoothing out or faying in parts.
Saw: for cutting raw materials into boards.
Plane: for smoothening out wood surfaces.
Lu Ban ruler: also known as “wengong ruler”, which, according to legend, was a system
of measurement invented by Lu Ban following Daoist truth and the laws of the Eight
Diagrams. With birth, aging, sickness, death and suffering as the basis, the ruler is
divided into 8 parts named cai, beng, yi, li, guan, li, hai and ben. When using the ruler,
cai is the top and beng the end, and it is important also to avoid the inauspicious and
adopt what is auspicious.
Modou: that part which serves as a container of ink is called mochi (ink-well) which
holds cotton wool soaked in ink. There is a line reel at the end. Cotton thread comes
through from the modou and is also soaked with ink. To use the modou, the cotton
thread is first fastened to the piece of wood which requires marking at each end, and by
gently pulling the thread outwards near the center and then letting it go, a clear and
distinct ink line appears on a raw piece of wood or boards measuring several meters.
Caulking iron: made of wrought iron and steel for the teeth. An iron loop forms part of
the wooden handle and is used for mixing hemp, rattan and lime and inserting the
mixture into crevices.
Shipbuilders
Over the centuries, ship-builders coming from Fuzhou, Quanzhou and Zhangzhou
slowly gathered in Fujian. Apprenticeship generally started at the age of 11 or 12.
Those who joined the profession were mostly members of ship-builders’ families; their
children, cousins or relatives. No less than 3 years of training were necessary. In the
beginning, apprentices were not allowed to handle the axe and helped only in menial
duties such as mending or minor repair work. Only after a number of years of training,
when students had picked up sufficient knowledge and skills from their masters, were
they allowed to work on important components such as keels, helms and masts before
they became masters. There is a common saying, “Master of a particular shipyard
builds ships exclusive to that shipyard”. Each shipyard had its unique ship form.
Generation after generation of ship-builders inherited the skills, expertise and

11

�experience passed to them by their predecessors, which over time established a given
set of practices and forms.
Crossed the Pacific Voyages
In Donnelly’s Chinese Junks and Other Native Craft, he listed three most important
crossed the Pacific voyages have been taken by type of Fuzhou pole junk and another
one was make by Xiamen fishing junk.






“Keying”: length of 48.7 m, Hong Kong to London, 1848.
“Whangho”: length of 30 m, Shanghai to San Pedro, 1906.
“Ningbo”: length of 42 m, Shanghai to San Pedro, 1912.
“Amoy”: length of 21.03 m, Xiamen to Victoria, 1922.

Captain Eric de Bisschop sailed a Xiamen built 12 ton gross junk Fou Po II in the
southwestern Pacific Ocean and East Indian Ocean. In 1955, a Fuzhou style cargo junk
with a length of 23 m, Free China, sailed from Taiwan to San Francisco. In 2008, our
experimental replica of Fujian Style warship “Princess Tai Ping” sailed form Xiamen to
San Francisco and Hawaii.
Conclusions
Unlike shipbuilding in other indigenous areas, the Chinese shipbuilding tradition
changed a little through all the time, the structure of square bows and sterns with
transverse watertight bulkhead and lugsails with bamboo mat and strip showed little
change over thousands of years, and the last successors of traditional shipbuilding are
alive. Western classifying studies of Chinese sailboats in the early of 20th century just
based on the field investigations and the interviews with the successors of traditional
naval architecture, such as the great achievements of François-Edmond Paris, Louis
Audemard, Barbosa Carmona, Donnelly Ivon, G. R. G. Worcester and Etienne Sigaut,
etc. It is last chance to be invested promptly on ethnographical field work investigation
for Fujian coast traditional shipbuilding centers. The Naval Architecture Manual of
Chen’s Family provided most detailed database so far, yielding valuable information
pertaining to principle of design, a modulus system, main unit data, and measures used
for typical ship forms of traditional Fujian style sea going sailing junks. ~There are still 3
shipwrights alive in Sha Po Wei, a valuable ethnographic resource, soon to be lost.
12

�Therefore, historical and archaeological projects need to be invested into promptly to
recover the historical archetypes of ancient Fujian Style Sea going junks, which will
provide helpful methods to explain and identify relevant ship remains excavated in
future shipwreck underwater archaeological projects.
Acknowledgements
Thanks are due to all members of CSJES, the last craftsmen of traditional Fujian naval
architecture and seamanship, who provided their invaluable experience and knowledge.
I must also express my sincere thanks to Dr. Jia Hao and Miss Jia Xiaofan. Dr. jiahao
helped me to search relevant historical materials and Miss Jia xiaofan revised the article
format.
References
Chen Guo Zai., 1919. The Naval Architecture Manual of Chen’s Family, Manuscript
(private collection), Xiamen.
Anonymous, Mid-17th Century. The Island of Formosa (painted on parchment).
Collection of Berlin Ethnological Museum, Berlin.
Oba, Osamu., 1972. About Drawings of Chinese Ship Kept in Matsuura Historical
Museum, Hirato: The Referential Material of Chinese Merchant Ship in the Era of Edo.
Memo 5 of Research Institute of East and West Academicals Studies of Kansai
University, Osaka suita: 13-49.
Chen Liang Shi., 2002. The Navy Abstract (Shui Shi Ji Yao), Reprinted from the Original
in Late 17th Century. Shanghai Ancient Books Publishing House, Shanghai: 329-337.
Anonymous, Mid-18th Century. The Illustrated Manual of Instruction in Shipbuilding for
the Navy of Fujian Province (Min Sheng Shui Shi Ge Biao Zhen Xie Ying Zhan Shao
Chuan Zhi Tu Ji), Manuscript.
Anonymous, 2002. The Regius Formula of Fujian Sea Going Warships (Qin Ding Fu
Jian Sheng Wai Hai Zhan Chuan Ze Li), (Reprinted from the Woodblock Edition in
1768). Shanghai Ancient Books Publishing House, Shanghai.
Huang Shu Jing., 1957. The Taiwan Conversation by Writing (Chi Kan Bi Tan),
Reprinted from the Original in Early 18th Century.
Business Bank, Taipei: 35-37.

13

Economic Academe of Taiwan

�Worcester, G. R. G., 1948. A Classification of the Principal Chinese Sea-going Junks
(south of the Yangtze). Shanghai Statistical Department of the Inspectorate General of
Customs, Shanghai: 66-67.
Chen Xi Yu, 1991. Chinese Sailing Junks and Overseas Trade. Xiamen University
Press, Xiamen: 114-127.
Xia Zi Yang, 1970. Shi Ryukyu Lu (Diplomatic Mission to Ryukyu), (Reprinted from the
Original in 1606). Economic Academe of Taiwan Business Bank, Taipei: 235.

Biography
Xu Lu is the initiator and director of Chinese Sailing Junk Expedition Society (CSJES),
an exclusive institute focus on protect and study ancient Chinese naval architecture and
nautical navigation. He also is commissioner of China Maritime History Studies
Association. As a maritime archaeologist special in the field of junks, he spent over a
decade on field work to investigate and ethnographic study the last traditional sailing
craft still be built and operating in China, wrote and released numerous academic
papers. He led an experimental archaeological ship-reconstructions project in 2007,
Princess Taiping, a junk replica sailed across the Pacific.

14

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                <text>The Naval Architecture of Ancient Fujian Style Sea Going Sailing Junks:  A Manuscript</text>
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                <text>As the most important qualities of ancient Chinese sailing junks, the square bows and sterns with transverse watertight bulkhead and the lugsails with bamboo mat and strip remained the same over thousands of years. Of which, the traditional Fujian style sea going junks is one of the major vessel forms for the ocean and oversea route in ancient China. This paper make an interpretation of Fujian style sea going junks through ship form and structure, principle of design, models, choice of material, sequence of construction, painting and decoration, tools, ship-builders, and ship component remains.  This study is combined with the interpretation of Chinese historical documents and drawings, foreign historical drawings, ethnographical field work on main traditional shipbuilding centers along the Fujian coast, reconstruction of traditional shipbuilding, land archaeology evidence, and especially gathers information from a newly discovered illustrated manuscript for shipbuilding. This manuscript at present is the most detailed manuscript found pertaining to the principle of design, modulus system, main unit data, measures and amounts materials used for each ship form.  The purpose of this paper is to recover the historical archetypes of ancient Fujian Style Sea going sailing junks, then providing one set of helpful method to explain and identify relevant ship remains excavated in future shipwreck underwater archaeological projects.</text>
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                    <text>Examining Coastal Shipping Processes around Shodo Island during the
Tokugawa Period
Kotaro Mogi
Doshisha University, Kyoto, Japan, 610-0394
Email: moooosha@gmail.com
Hiroomi Tsumura
Doshisha University, Kyoto, Japan, 610-0394
Email: Tsumura_Mobile@htsumura.msoutlookonline.net
Abstract
Shodo Island in the Seto inland sea used to be the major entrepôt of wall stones, which
were taken to the Osaka castle, gathered from some islets around this island. The
processes of constructing Japanese castle walls are composed of three processes, viz.
quarrying stones, shipping or transporting them, and heaping them up. While many
historians have studied upon quarrying and piling them, no comprehensive research
has been done as for shipping or transporting them, mainly because no historical
document exits. In order to throw light upon seaborne stone transportation from Shodo
Island to Osaka, therefore, underwater surveys around this island were carried out on
seabed As a result, many submerged wall stones, as well as a submerged stone called
“Kamome Ishi”, on which an old stone post was stood, succeeded in being found on the
bottom of the sea; this mooring post is said to be built by ship owners who carried wall
stones to the Osaka castle, and these waters could serve the most important mooring
port of Shodo Island for wall stone transportation. To prove this historic event, a tide
simulation on the basis of survey data was analyzed and a reconstructed model for
mooring and loading wall stones around the mooring post was hypothesized, which was
verified by current fieldworks. Although millions of mariners have been working in the
Seto inland sea since the ancient times, a new maritime and navigational technique
seems to be emerged from Shodo Island and its surroundings early in the 17th century.
Key words: Shodo Island, Tokugawa Period, Kamome Ishi, Seto inland sea, Yaana
Introduction
This paper will examine the shipping processes of stone used to build Osaka Castle's
wall in the Tokugawa period. Shodo Island in the Seto inland sea used to be the major
entrepôt of wall stones, which were taken to the Osaka castle, gathered from some
islets around this island. This entrepôt has been recognized coastal areas of the Seto
inland including Settu Ashiya or Mikage other than Shodo Island. It is discussed from
historical and archaeological viewpoints through analysis of castle history about the
actual conditions of "job site" as processing stone and the "daimyos" who managed it. It
1

�may be said that the east Seto Inland sea where Shodo Island is located is a "field of
action", having various cultural landscapes since ancient times. Above all, in this field,
cultural behavior mainly on "the stone" has been carried out. For instance, the
fabrication methods of chipped stone tools called "Setouchi blade" in antiquity, was the
stone used for Osaka castle's wall in the medieval period, and contemporary stones
used for modern building. It goes without saying that "the stone" used as tools to
support local life continue supporting our culture now. "The stone" is the remarkable
keyword if we intend to establish a cultural landscape in the eastern Seto inland sea.
Based on the above, in this study, "the stone" that is constructing Osaka castle's wall as
the target, we want to reevaluate the technical examination. Thus far, the processes of
constructing Japanese castle walls are composed of three processes, viz. quarrying
stones, shipping or transporting them, and heaping them up. While many historians has
studied upon quarrying and piling them, no comprehensive research has been done as
for shipping or transporting them, mainly because no historical documents exit.
Therefore, the focus of this study is evaluating and examining the shipping process by
carrying out an underwater investigation which has not been done in a conventional
study. The research area is the Tenguiwaiso job site located at Iwagatani, on east coast
in Shodo Island. We attempt a construction of the data from the basis of an
environmental view point by cyclopedically analyzing the whole area between the shore
and the sea. There are few similar examples of the practice of using of the underwater
archaeology in such a manner. Particularly, the direction through such practices can
bring up new questions, and it becomes a methodological approach to propose the
clarifying facts between the relations of human and technology on maritime culture. The
important point in this study is how to take the sea into account. In a conventional stone
wall study, it relies mostly on the political description about each daimyos who managed
job site and a technical description about how to break stones or to construct the castle,
however, it is necessary to interpret this as "how they shipped the stones" to assume
that the people who carried and engaged it. Technical invention can overcome this
special environment like a sea is a major premise used to know this environment. We
estimate the technique ("the knowledge") from investigation of environment and
archaeological structure.
2

�Research in Tenguiwaiso Job Site
There

are

Minamidani,

Tenguiwa,

Tenguiwaiso,

Tofu,

Kamesaki, and Hachininishi Job sites in Iwagatani on the
east coast of Shodo Island, and scattered wall stones on
each sites. These sites were designated as national historical
sites in 1972. The study was of a number of stones, classified
with processing marks called "Yaana" in Japanese, and
arranged with the carved seal of the daimyos was researched
as that time. The Tenguiwaiso job site is a curved site
Fig. 1 Research area division comprising of a whole shoreline of white sand (the seaside).
of the project. (K. Mogi).
The area is lined with ship setting stones faced with the

“Yanna” seal on this beach. The Tenguiwa job site is located in the western mountains
from the Tenguiwaiso job site; hence it appears that it is the geographical location where
a quarry was established. Stone from the area was removed and taken to the
Tenguiwaiso job site. A torrential downpour by typhoon No. 8 in 1974 caused a landslide
which flowed down onto the shore. Reports that some stones fell down with this
landslide has been documented. Therefore, we must take the geographical change of
the site into account both before and after the disaster. Grasping the present state of it
is the first priority, and the construction of such a site will be an important model to be
analyzed later.
Investigation Method
The basic purpose of this investigation is to obtain data that is topographical and
understanding the stone distribution in the whole range of the shore area (both above
and below water). The number of stones and the drawings has been recorded by the
administrative report, yet the information of which stones are left and in which position
and environment was not documented. In this investigation, we acquired data that
considered the position of stones, their location on the site and in which kind of
environment they were found. In addition to all the stone distribution, it is necessary to
obtain the topographical and environmental information.
Acquisition Data of Topographical and Distribution of Stones on the Shore
To grasp more objectively the shape and distribution of the stones, we conducted
3

�photography from a high elevation of where the stones appeared by using a 5 m,
expandable surveying staff with a camera clamp attached to the upper part of the staff.
We contrived a system of linking positional information (coordinates) and the
photograph, to determine the scale and a direction of the photograph. Photos were
taken mainly of wall stones, big stones, and granite blocks. Given the large area and
multitude of objects on the site, the methodology that was used would have a more
quantitative sample. By using such a scientific example, the site would be easy to
reproduce. In getting a topographical data, a total station (TS) is used at every
surveying site today. It calculated the distance and the height to collimation point (prism)
from the machine point (TS), by collimating at a change point of topography and other
points in a random order. Each position and elevation was then derived from calculated
coordinate data, which made a basic contour map from the data. In addition, we
acquired data which was used for the position, scale, and directional information for the
photographical surveying mentioned above. To understand the geographical feature, it
could help verify the distribution of stones under each kind of environment, and allowed
us to determine where the natural and artificial topographies lied on the site.
Acquisition data of topographical and
distribution of stones underwater
Based on the results of the investigation in
2012, we determined the rough distribution of
stones in all underwater areas by viewing via
snorkeling. By this confirmation, we divided
the area where stones were distributed
conspicuously,
Fig. 2 "Kamome Ishi". (K. Mogi)

and

subsequently

investigated these areas (Fig. 1). Between

each area was a sandy area where stones had not been observed. There is a
submerged rock of approximately 3 m in height named "Kamome Ishi" (Fig. 2), on which
an old stone post stood at research area II in the open circle of Fig. 1. In local transition,
it may be a mooring post that was said to be built by ship owners who carried wall
stones to the Osaka castle. "Kamome Ishi" was examined mainly in 2012. It was
hypothesized as a mooring post and modeled as such, however, it was not conclusive,
4

�thus a reevaluation of the area was deemed necessary. Each section was then divided
up via measuring tape into 50×50 m blocks. We then checked the distribution of the
stones by scanning the bottom of the sea using animation photography (HERO3 of
GoPro). A mark was made at every 1m interval, and at each interval, a photo was taken
(Fig. 3). A gap in the image when it was composed was the blurring of the camera
position, and the bob weight on the camera was taken in the angle of view. It blurred at
the time of photography by setting up an angle to deserve gaps of image, and we
compensated for this (Fig. 4). The process provided direction, scale and position of the
image by yielding a coordinate on the initial point, middle point, and terminal point on
each 1 m measurement line. Based on such a procedure, we acquired consistent
underwater data sets to collate with the topographical data gathered from the shoreline.
The acquisition method of the
underwater

topographical

data was used as well as the
surveying

method

at

the

shore area stated earlier. We
measured the topography at
random to the spot about 300
m ahead from the shore.
Collimation (prism) attached
top of the measurement staff,
Fig. 3 Underwater Photographing Method. (K. Mogi)

calculated distance and height of

the collimation point from the machine point (TS). We stabilized the collimation and the
staff by two scuba divers and one snorkeler manning each at bottom of the sea position,
middle position, and surface of the water position. The diver at the sea bed selected a
change point of the topography at approximately 5-10 m and at random, and the diver at
the surface determined the direction of movement. In addition, a research member on
the ship acted as contact to the operator on the shore. Each position and elevation of
collimation are derived from calculated coordinate data, it matched data of the shore
area, and made a basic contour model. The measurements between the ship using
sonar or multi-beam is common for an ocean study and the method of making a counter
5

�map at the bottom of the sea, is necessary completion with the land since this area is
the full coastal zone in this study. For that reason, we think that bringing a land method
into practice underwater brings yields valuable information, since we are able to obtain
data with a more detailed approach using
such a method.
Reduction and Analysis of Acquisition
Data
Topographical Data in the Shore and
the Underwater
To coordinate topographical data at the
shore and the underwater area using the
practice mentioned above and extract
latitude

and

longitude,

we

made

a

topographical map (contour) of the whole
research area by Kriging method used in
Fig. 4 Method of Control and Revision of the geology (Fig. 5). Reproduction of the
Camera Position. (K. Mogi)
shore and the seafloor topography was

compiled to match and supplement both data sets of these environments. In
consideration of Fig. 5, the shore topography makes curves like a bow and in
perspective we know that it formed a gentle topography to measure points at the off
side at approximately 300 m. In addition, the shore area represents a beach with a
sandwiched concavity in both the north and the south of the site. The port and the
breakwater have shore protection at present. From a narrower perspective, it is
confirmed that the large shallow area in the north coastal zone, and the irregular
sequences on the contour line which in the center of coastal zone are consistent with
the location of "Kamome Ishi". Please note that the two dales in the northeast side (the
shore side) from its area. This has been confirmed on site; the erosion traces by the
wave could be seen on the lower part it. These two dales formed a geographical
placement that suggests relation with the Tenguiwa job site as a quarry located in the
mountains place of the northeast side.
Additionally, the dale topography is around a 10 m deep on the southeast side. This
6

�may be a part of the site influenced by the disaster in 1974; it could show which area
was affected my observing mudflow sediment. Depending upon the size of the disaster,
the landslide sediments left traces we can observe. Yet the sediment is not present. It is
possible that the landslide sediment disappeared via the erosion of water from the
disaster. Undoubtedly, an area along the shore that is predominantly affected by waves,
tidal flow, and topography, it is obvious that the natural and physical phenomenon such
as the erosion forms chaotic natural molding for the beach topography and the
landscape. However, it does not lead to the generalization of the natural phenomenon in
the shore area when compared with a study of hydrology or engineering science in the
region these days, so it is suggested that a "Critical transition" occurred (Marten
Scheffer, 2009) which represents dramatic chaos on the site which change some
parameters. To consider such a background, while taking a wave and a flow of the sea
into account, it must push forward by discussing this as an interpretation of the shipping
process based on the analysis of the
data.
Distribution of Stones in the Shore
and Underwater Area
To

coordinate

the

distribution

of

stones from both on the shore and
underwater, we digitized the shape of
Fig. 5 Topographical Map in Shore and under Water. each stone via enforced geometry
(K. Mogi)
correction,
stored
in
a
GIS

(Geographic Information System). It distinguished the stones from the sand, and other
objects (e.g. noise) by checking color tone and image, and subsequently made a
distribution map of the stones (Fig. 6). We are analyzing it now, making a distribution
map of stones in the whole investigation area.
Stones left on the job site without being carried to Osaka castle were labelled as
"Unfortunate Stones". Nevertheless, it is strange that many of the stones were recorded
underwater. It has our assumption that the stones underwater were stones which fell
into the sea, and were left without being recovered. This practice could have propelled
the myth of "the fall of the castle" used in local folklore. To understand it better, see Fig.
7

�5, where stones are concentrated, appearing that they have a consistent arrangement.
As mentioned before, the sandy area is devoid of stones. The distribution of stones
would be scattered everywhere in a more random pattern if they were not picked up
because it would mean "the fall of the castle". Therefore, in this study, we doubt the
claim of these stones being called" Unfortunate Stones", and put forward the theory that
the distribution of stones underwater as "intentional".
Suggestion of the Shipping Process
First, as the examination of "Kamome Ishi" (Fig. 2) mentioned above, authors have tried
modeling the shipping process completely dependent on high and low tides. In particular,
because it made a hole in the top surface of "Kamome Ishi" and a stone pillar was
embedded in it, it was assumed as a mooring post. The "Moyai" in the Sea of Japan is a
similar example, and it could be said that the “Kamome Ishi” has a similar structure to
the mooring post. However, including an example of the Sea of Japan, the mooring post
for ships docking at old ports was typically made in most of the sea cliffs or the wave cut
bench which have an enclosed cape or a cliff facing the sea. In contrast, the "Kamome
Ishi" is located in the sea at approximately 2 m depth on the average. It is unique that
the post is placed directly ahead of the shore. Authors have measured and investigated
the "Kamome Ishi" from 2012, and examined and evaluated its function. Assuming the
"Kamome Ishi" serves the function of mooring a ship, it becomes necessary that the
post is always higher than the height of the water surface. Tidal analysis was conducted
on the region between the years 1619 CE (the year the Osaka castle began
construction) to 1630 CE (the year the Osaka castle was completed). The data allowed
us to deduce that waves never surpassed more than upper parts on "Kamome Ishi" of
approximately 320 cm height. Therefore the stone pillar was always higher than water
surface. From this, it could be said to some degree of certainty that the "Kamome Ishi"
did indeed function as a mooring post. One interpretation in this is, viz. A ship, such as a
flatboat arrived between the land and the "Kamome Ishi" at high tide. It then it moored
the ship using its anchor and the stone pillar of "Kamome Ishi". The ship ran aground at
low tide and used a board as a gangplank between the land and the ship. After loading
the stones it waited until high tide (when the ship refloated), and started sailing. This
process is an assumed hypothesis. Since historical documents and records are poor
8

�pertaining to shipping or transporting this material, we can only hypothesize a scenario
such as this one.
Secondary, the authors paid close attention to the near shore current system in the area.
The shore topography forms the curves like a large bow over the area. Generally, the
near shore current system forms a circulatory system where the shore is nearer than
the sea area as has the relatively same flow as the shore ward currents flowing onto
shore, Long shore currents flow along the shore, while Rip currents flow seaward from
the shoreline. Rip currents have a particularly strong flow in the near shore current
system and forms a regular circulating flow style. Depending on this system, the cusp
topography which formed the arch-formed shoreline was affected rhythmically occur
and has been confirmed in the Tenguiwaiso job site where the team investigated. It was
often chosen as a place ("current") to begin rowing unconsciously, so that a big wave is
hard to flow at the place that Rip currents are being produced. Therefore, we can
consider that a ship laden with the Osaka castle wall stones starting to sail through the
mechanism of the Rip currents. . The conditions that Rip current occur and concentrates
are a sandy coast, a shoreline bended into an arc form, a surface wave flow on top of
sandy coast, and a near structure such as breakwaters which stuck out from shore.
Based on the above information and the checked topography in Tenguiwaiso (Fig. 5),
these

are

very

present

in

this

environment.
There are two dales on the northeast
side of the shore area. These two
dales play a big role in the Rip
currents' formation. Looking at the
topography data, the sandy coast
topography formed a fold, not a
straight line. On the other hand, while
the wave characteristically diffracts to
Fig. 6 Distribution Map of Stones. (K. Mogi)

the shallow direction, it is concentrated

on a pointed part topographically. Hence, we can understand this two dales have
topographical characteristics to form Rip current. Where the "Kamome Ishi" is located, it
9

�forms a line at right angles to the shore. An Irregular sequence is observed near this
rock and "Kamome Ishi" by topographical data (Fig. 5). In particular, Rip currents are
particularly faster near the structure, so it is our opinion that a ship moored at the
"Kamome Ishi" can benefit from these extra rapid Rip currents. In light of these Rip
currents and topography data, it was suggested that the ships landing here exploit this
process when sailing from I and II in Fig. 1 in particular.
Conclusion
This paper examined coastal shipping process of wall stones by evaluating environment
around the area and investigating underwater structure and stones. And we gave a new
suggestion against it was inarticulate manner. Although it may not wish that is over a
level of "the interpretation", it is necessary more procedural analysis that mainly
investigation or field work and method to the interpretation in case of treating such
several ways and estimations are accomplished. There are still a lot of challenges for
the future; however we think that can give a new suggestion for the wall stones study
mainly political and technical. It is necessary to let method of investigation and
environmental evaluation more deepen hereafter.
Acknowledgements
My heartfelt appreciation goes to Prof. Tsumura whose comments and suggestions
were of inestimable value for my study. I am also indebt to Prof. Iwabuchi, Prof. Nakada
and anonymous reviewers whose comments made contribution to my thesis.
References
Board of Education in Utsumi town., 1979. Conservation Management of A Historical
Site Osaka Castle's Wall Stones Job Site, Kagawa: 4-7, 17-19, (in Japanese).
Hiroomi, T., 2013.

"Cultural Landscape" of Maritime People Understanding from

Investigated Underwater Archaeological Feature in Tenguiwaiso. Symposium of Stones
Attraction Creating in Shodo Island, in Ministry of Strategy and Finance Shodo island
Kagawa: 61-67, (in Japanese).
Kotaro, M., and Yuichi, T., 2013. Tide Simulation and Inquiring of Shipping Process in
Coastal Zone, Shodoshima. The 30th Annual Meeting of the Japan Society for Science
Studies on Cultural Property Abstracts, in Society for Science Studies on Cultural
Property Hirosaki: 118-119, (in Japanese).
10

�Kyoji, Y., 2002.

About Mooring port remaining Moroyose Fishing port.

Board of

Education in Hamasaka town Press, Hyogo: 5-11, (in Japanese).
Marten, S., 2009. Critical Transition in Nature and Society. Princeton University Press,
New Jersey: 11-15.
Yuichi, T., Tappei, M., Keisuke, F., and Kotaro, M. 2013.

Application of Scanning

Surveying Technique for Archaeological Features Using Phtogrammetry.

The 30th

Annual Meeting of the Japan Society for Science Studies on Cultural Property Abstracts,
in Society for Science Studies on Cultural Property Hirosaki: 146-147, (in Japanese).
Biography
Kotaro Mogi is perusing his Masters in the Graduate School of Culture and Information
Science at Doshisha University in Japan. He is interested in Spatiotemporal Informatics,
Cultural Anthropology, Maritime Archaeology, and Information Science. Especially, study
is that interaction water environment including sea and human in principal objective, and
human behavior in the space. It is intended to evaluate the human behavior from the
information to be provided the investigation in underwater cultural heritage and analysis
environment around it. Main research areas are the Seto inland Sea, Egypt, Motosu
Lake, and Maldives.
Hioomi Tsumura is the Associate Professor in Faculty of Culture and Information
Science, and Director of the Research Center for Knowledge Science in cultural
heritage, Doshisha University in Japan. He is specialized in are Spatiotemporal
Informatics and Human ecology. His past work includes: The E-way into the four
Dimensions of Cultural Heritage (Archeopress, 2004), Site-Catchment Analysis of
Prehistoric Settlements by Reconstructing Paleoenvironments with GIS; "GIS-Based
Studies in the Humanities and Social Science" (Taylor and Francis, 2005), and
"Geography Information Science Dictionary" (Asakura Press, 2004).

11

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
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                <text>Examining Coastal Shipping Processes around Shodo Island during the Tokugawa Period </text>
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                <text>Shodo Island in the Seto inland sea used to be the major entrepÃ´t of wall stones, which were taken to the Osaka castle, gathered from some islets around this island.  The processes of constructing Japanese castle walls are composed of three processes, viz. quarrying stones, shipping or transporting them, and heaping them up. While many historians have studied upon quarrying and piling them, no comprehensive research has been done as for shipping or transporting them, mainly because no historical document exits.  In order to throw light upon seaborne stone transportation from Shodo Island to Osaka, therefore, underwater surveys around this island were carried out on seabed  As a result, many submerged wall stones, as well as a submerged stone called â€œKamome Ishiâ€, on which an old stone post was stood, succeeded in being found on the bottom of the sea; this mooring post is said to be built by ship owners who carried wall stones to the Osaka castle, and these waters could serve the most important mooring port of Shodo Island for wall stone transportation.  To prove this historic event, a tide simulation on the basis of survey data was analyzed and a reconstructed model for mooring and loading wall stones around the mooring post was hypothesized, which was verified by current fieldworks.  Although millions of mariners have been working in the Seto inland sea since the ancient times, a new maritime and navigational technique seems to be emerged from Shodo Island and its surroundings early in the 17th century.</text>
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                <text>Hiroomi Tsumura, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.)</text>
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                    <text>The Cultural Property of Military Forts on the Sea or Kai-hou in Tokyo Bay: From
the viewpoint of underwater cultural heritage
Tatsuya Nakada
Tokyo University of Marine Science and Technology, Tokyo, Japan, 108-8477
Email: picono@kaiyodia.ac.jp
Toshiaki Hayashibara
Asian Research Institute of Underwater Archaeology,Fukuoka, Japan, 812-0041
Email: underwater03@gmail.com
Abstract
At the end of the 19th century the Japanese government built several military forts on
the sea or artificial islands inside Tokyo bay in order to defend its capital from foreign
sea powers. Three outer forts or Kai-hou, which were between the cape of Kannon, the
cape of Huttsu, and Saruis land, formed the first naval defensive line. The first fort
started to be constructed in 1881, and then finished in 1890. The second was built
between 1889 and 1914, and the third between 1892 and 1921. Among three, only the
third one does not exist anymore. In 2000 the governmental demolition project of the
third fort began mainly because of the congested seaborne traffic, and was completed
in 2007. During the work, some of its building materials were salvaged, which have
been exhibited in a city park since 2006; they are now Yokosuka-City-Designated
Important Cultural Properties. The underwater structures of the fort were also removed
and reconstructed in a council owned ground; in 2013 they were also registered as the
above-mentioned cultural properties. On the other hand, the first fort is now owned and
charged by the ministry of finance and the second by the ministry of land, infrastructure,
transport and tourism. Although both have already been registered as Sites Which
Contain Buried Cultural Properties by the local educational committee, the
governmental restoration work of the second fort is under way without any legal
procedures in conformity with the Japanese domestic law of Act on Protection of
Cultural Properties.
Key words: Kai-hou, Tokyo Bay, Taisho Period, Protection of Cultural Properties,
Archaeological Heritage Site

Introduction
Kai-hou means fort on the sea. On the same ground that in the last period of Edo gun
batteries on the sea called O-daiba (o is an honorific title which is added before noun for
shogunate or its related organizations or facilities) was constructed to defend the capital,
Meiji Government constructed three Kaihous on the sea located in the middle of Tokyo
Bay. They could be regarded as Underwater Cultural Heritage. As two kaihous of three
are designated as archaeological Heritage Sites in accordance with Act on Protection of
1

�Cultural Properties, the treatment of them shall be abided
by the Act.
Kai-hous in Tokyo bay (Military Forts on the Sea or
Kai-hous)
They are artificial islands on the sea with defensive
facilities including gun batteries constructed to defend
Tokyo from Meiji to Taisho period (the late 19th century to
the early 20th century). After three forts on the sea were
built, the army had resided there.
never fired in the actual war.

The cannons were

After the Great Kanto

earthquake of 1923, the alteration of national defensive
policy made Kai-hous unnecessary. They have been let Fig. 1 A Bird's Eye View of Tokyo
Bay. (T. Hayashibara)
alone for a long time.
The Construction Technology of Kai-hou in Tokyo Bay
Perceived foreign vessels had come to frequently appear offshore Japan at the end of
Edo period; the necessity of coastal defense was urged. Particularly Perry's squadron’s
visit to Uraga obliged Edo Shogunate to defend Tokyo bay. The first defensive and
inspection line from Cape Kenzaki to Cape Sunosaki intended to confirm the purpose of
arrival of ships and ordered them to expel from Edo bay, and the second defensive line
from the cape Kannon to the cape Huttsu intended to sink them simultaneously by all
forts around the line in case of invading across the line (Fig. 1).The first artificial fort
(Shinagawa O-daiba) was constructed near the coastline of Edo Castle. Though at first
12 forts were scheduled to be construct, only 6 forts were built due to finance and
technical problems. The line between the cape Huttsu in Chiba Prefecture and the cape
Kannon in Kanagawa prefecture “to repel” foreign vessels at the end of Edo Period had
geopolitical merits of the narrowest sea area in Tokyo bay. Meiji government had also
determined to construct artificial lands or forts on the sea. The each distance among
forts called Kai-hous was approximately 2.5 km considering shot-range at that time.
Having been used enormous amount of stone or sand, they were gathered and
transported from Chiba and Kanagawa prefectures. A variety of techniques such as
construction technology of Shinagawa O-daiba, traditional masonry technique and most
2

�advanced engineering works or diving technology (such as helmet type of diving
apparatus) were used at the construction. Because of deep water (about 40m around
the third Kai-hou) and too fast current, construction work sometimes ran into difficulties
and took a toll of lives. However it took 43 years for the construction of Kai-hous to
complete works.
The History and Situation of Kai-hous in Tokyo Bay
The first Kai-hou is located at the westward 2.3km offshore Futtu city of Chiba
prefecture, and belongs to the Ministry of Finance. Its area is 23,000m 2 at high tide.
The depth of water is around 1-3 m. As it is not preserved, sand used as its base
appears exposed and neglected; some structures have collapsed (Fig. 2 and 3). The
second Kai-hou is located at the further westward offshore 2.5 km from the first Kai-hou
offshore the Cape Futtsu. Its area is 41,000m2 at high tide. The depth of water is
around 8-10 m. The second Kai-hou also seems to have been neglected. Having been
equipped with radar and used for emergency drills, recently the ministry of land,
infrastructure, transport and tourism (hereinafter MILT) has maintained and reused the
second Kai-hou.

Fig. 2 The Whole View of the first Kai-hou. Fig. 3 Several Parts of Military Facilities
(Google Earth)
Collapsed on the Side of the first Kai-hou. (T.
Hayashibara)

The third Kai-hou is located at the northward offshore 2.5 km from the Cape of Kannon.
Its area was 26,000m2 at high tide. The depth of water is the deepest of all Kai-hous at
around 40m. Although it took 30 years to complete the construction, one third of the
third Kai-hou was submerged due to Great Kanto earthquake of 1923. Since these
became obstacles on navigation route, the removal project was implemented in 2000-

3

�2007. All structures seen on the surface of the sea were moved away. Though we
cannot confirm, underwater remains (basic parts of the structure) appear to be intact.
Act on the Protection of Cultural Properties and Kai-hous
Archaeological Heritage Site
Act on the Protection of Cultural Properties (1950) adopted the legal terminology “buried
cultural property” for the first time as a conception including ruins or relics. As long as
underwater objects are found within the territorial sea, raised objects or artifacts could
be treated as “buried cultural property” (Cabinet Legislation Bureau, September 18th,
1960). Then archaeological heritage sites would be delimited by arbitrary zoning around
the areas which could contain “buried cultural property” or ruins. In case of the first and
second Kai-hous, historical facts are evident. Among Shinagawa O-daibas which is
historically and technically relevant to Kai-hous, the third and sixth O-daibas were
designated as National historic site in 1926 by Historical Spot, Scenic Beauty and
Natural Monument Preservation Law (1919). In 1995, the Agency for Cultural Affairs
referred to heritage of industrial modernization as a type of cultural property due to a
revision of the criteria of the designation for Historical Spot, Scenic Beauty and Natural
Monument. Therefore the legal range of cultural property was extended from mid-Meiji
era to end of WW II. In August 1 of 2002, Cultural Properties Department proclaimed
that it surveyed to register Tokyo bay gun battery ruins as heritage of industrial
modernization. It selected Motosu gun battery, the first and the second Kai-hous from a
body of Tokyo bay gun battery ruins as “heritage of industrial modernization”. Research
products could nominate as national historic site.

In April 30 of 2003, Futtsu City

Council of Cultural Property confirmed that the proposal of designation of historic sites
should be embodied within the year on the memorandum titled “Respecting the
Protection and Practical Utilization of the first Kai-hou and the Cape Futtsu” (Kosaka,
2004). Although more than 20 years have elapsed since then, the report is yet to be
published. According to “the distributive map of ruins in Futtsu City” made in March
1975 for the first time, all Motosu gun batteries, the first and second Kai-hous weren’t
registered as archaeological heritage sites. It was not until 1987 that the first and
second Kai-hous were not only registered in “Map of Ruins,” but also Motosu gun
Battery was registered in “the map.” Motosu gun battery, the first and second Kai-hous
4

�were registered in “the distributive map of ruins in Chiba prefecture” (March2000).
Consequently the construction works shall be notified within 60 days in compliance with
articles 92-95 of Act on Protection of Cultural Properties.
In July 2010, it turned out that a branch office of MILT destroyed considerable parts of
the second Kai-hou registered as archaeological heritage site. Worried the second Kaihou might collapse by typhoon or earthquake, the construction began in 2007 so as to
remove obstacles on navigation routes. A section chief of Tokyo Bay Waterway Office
told that no report was given from Third Regional Coast Guard Headquarters who owns
the second Kai-hou, we didn’t perceive the second Kai-hou was included in
Archaeological Heritage Site. In the meantime it was revealed that the construction was
the whole renovation of the second Kai-hou, and Futtsu City Council of Cultural
Property held an urgent meeting in July2010.We inquired the Chiba Prefecture Board of
Education about this problem, and the Board replied as follows. First concerning the
well-known archaeological heritage site registered as “the second Kai-hou,” the
construction had been carried out without any notification or consultation for both
prefecture and city Board of Education. Secondly, as regards the third Kai-hou, Tokyo
Bay Waterway Office removed the sunken rocks and tried to record the state of ruins
and to open the information to the public 2000 to 2007. Thirdly, as regards the
construction of the second Kai-hou, a request paper (August 11, 2010) which stipulated
the fact that many people in Futtsu committed to this construction was submitted to
Tokyo Bay Waterway Office.
The Different Treatment of Kai-hous by Different Administration
Both the first and second Kai-hous have the Futtu city’s land register. These registers
were decided as the matter respecting the jurisdiction of Kai-hous (decree 72)
(Takahashi, 2004a). The third Kai-hou belonged to Yokosuka city. When sunken rocks
were removed due to safe navigation, its land register was erased prior to the
construction.
Since 35% of the third Kai-hou became sunken debris, the underwater structures up to
the depth of 23m from the surface were removed in 2007. This construction raised so
called “Large-sized Barracks” from plenty of remains in February 2005. This was
transported to Umikaze Park owned by Yokosuka city in February 2006, it is
5

�permanently open to the public since March 1 of 2006 (Fig. 4).

A Body, which

developed into NPO in February 2009, posed a problem about the conservation of the
third Kai-hou remains in January 2007. There were some remains raised other than
“Large-sized Barracks.” The Body held a symposium on the relocation to Oppama of
other remains of the third Kai-hou in July 2007. “Large-sized Barracks” was designated
as important cultural properties by Yokosuka city in March 10 of 2009. Regarding this
chance as the best timing, the NPO consulted with MILT about the treatment of remains
of third Kai-hou. Thus three remains named Observation Station, Searchlight and Side
Storage Room were determined to be selected and relocated them to City Ground in
Natsui land. After this construction was carried out in 2010, three underwater remains
were open to the public in April in the following year.
Then the NPO moved to get the designation of
remains exhibited at Oppama as important
cultural

property.

Designation

of

cultural

properties by Agency for Cultural Affairs is of
great use when citizens make applications for
subsidy. Consequently three structures were
additionally designated as important cultural
properties. It is worthy of notice that Tokyo
Fig. 4 Large-sized Barracks of the 3rd Kai- Bay Waterway Office was willing to disclose
houRaised in February, 2005 is Permanently
Open to the Public in Umikaze Park of their own actual conditions exposed by the
Yokosuka City. (T. Nakada)

removal construction to citizens. This suggests

that the office recorded certainly information of building technology through observing
remains raised (Takahashi, 2004a). “The construction History of the Third Kai-houin
Tokyo bay” (a volume of 630 pages) published in March2010 by Tokyo Bay Waterway
Office based upon lots of information is the precious and exhaustive document record.
World Heritage and Kai-hous
Etuko Takahashi who was one of authors of “The construction History of the Third Kaihou in Tokyo bay” stated that though a body of gun batteries in Tokyo bay including
Shinagawa O-daiba deserved World Heritage, the current state remained seriously
critical (Asahi Shimbun, 2009). Such a point of view is extremely significant. Because
6

�viewing or estimating Kai-hous in light of world heritage never permits different
treatment of remains by the different authorities. Moreover from a view of World
Heritage, historic remains including Kai-hous must be perceived as “in totality; the
conditions of integrity to properties” (Operational Guidelines of the World Heritage
Convention, para. 89). In fact, the first, second and third Kai-hous are constructed like
arc shape between Cape Huttu and Saruis land. This could be overviewed as a
landmark of the entrance of Tokyo bay, as Sumihisa Takahashi (1927-2005)
emphasized repeatedly. He proposed the first Kai-houand Motosu gun battery at the
end of the Cape Futtsu be regarded as Historic sites (Takahashi, 2002). In this sense,
the expression of “Kai-hou three brothers” by the chief Kazuo Kosaka of Tokyo Bay Fort
Fan Club is very symbolic. As regards the raised relics other than remains transported
to Umikaze park, he stated it was desirable that Futtsu city conserve the rest of the
raised relics which have historical relation with the first, second and third Kai-hous. This
shows eloquently his deep insight.
The idea of Kosaka and World Heritage Convention seems almost the same. The
subjects of the convention are monuments, architectural works, elements or structures
of an archaeological nature etc., which are of “outstanding universal value” from the
historical point of view (articles 1 and 2). The Basic scheme of the Convention is to draw
up the World Heritage List (article 11). The registration of the list is examined and
decided based on applications by each state parties. The World Heritage Committee
were created in order to examine such applications in detail.
The World Heritage Committee drew up the global strategy in 1994. It mentioned new
types of heritage such as cultural landscape, industrial heritage and modern
architecture that had not ever been designated. Japan also added a new type of cultural
property called cultural landscape to Act on the Protection of Cultural Properties in
April2005. Its definition articulates “indispensable subjects to understand our lives or
livelihood selected from lives or livelihood of people living in the region and landscape
formed by its cultural climate” (article 2.1.5). Japanese provisional list have been drawn
up by Agency for Cultural Affairs based upon the opinion of Council for Cultural Affairs.
World cultural heritage special committee has made reference to the operational
guidelines accepting proposals of prefectures and municipalities since 2007. It is
7

�expected that such selection is based on not political but purely archaeological
examination.

Fig. 5 The Whole View of the 2nd Kai-hou in Fig. 6 The Whole View of the second Kai-hou. (S.
February, 2000. (Tokyo Bay Fort Fan Club)
Takayama)

Administrative tasks about Kai-hous
The proposal to the First and the Second Kai-hous
Before the destruction of considerable parts of the second Kai-hou was revealed, in the
regular prefectural assembly in 2008 Mitsuru Yoshimoto proposed that the first and
second Kai-hous be world heritage. In the assembly, when he questioned about survey
of Agency for Cultural Affairs, the chief of board of education replied that although the
first and second Kai-hous were selected as one of 50 sites and indeed the research was
carried out, the report remains to be published as of February 2004. When Yoshimoto
questioned whether a body of Tokyo bay forts should be registered and conserved as
world heritage, the chief of board of education replied that the registration of world
heritage needed the designation of national historic in advance (Yoshimoto, 2008).
In the assembly in December 2010 soon after the destruction of the second Kai-hou
was revealed, when Yoshimoto inquired whether the report was published, the chief of
board of education replied that as of February 2011 it had not been published. Though
Chiba Prefectural Board of Education alleged the report would decide the significance of
the first and second Kai-hous (Yoshimoto, 2011), as of January 2014 it has yet to be
published.
The Present Conditions and Problems on the Second Kai-hou
As the second Kai-hou has let alone for about 70 years since its abandonment, it has
fallen into ruin (Fig. 5).

The revetment protection and restoration works were
8

�implemented as “Renewal Project” by MLIT in 2007, some works were completed in
2013 (Fig. 6). However, in the construction, due to insufficient cooperation between
project executors and administrative officers, the advance archaeological research was
not implemented in conformity with Act on the Protection of Cultural Properties (Tokyo
Bay Waterway office). When we participated in a marine inspection in 2012, we
confirmed the state covered with concretes to rivet the coastline. The fact that the legal
archaeological research was not implemented means that regardless of registration of
archaeological heritage sites, “the degree of importance as cultural heritage” is never
verified. Therefore researches to get hold of the current state and pick up poor
information of remains is strongly required. It is desirable that such researches be
carried out and the researchers publicly disseminate their products.
The Treatment as Cultural Property of Parts of Foundations Left behind under the
Third Kai-hou
The depth of water of the third Kai-hou is around 40m. That of the second Kai-hou is
only 1-4 m. The construction period of the third Kai-hou was much longer than that of
the second Kai-hou. The amount of stones and sand used by the construction was
approximately 16 times larger than that of the first Kai-hou, and about 4 times larger
than that of the second Kai-hou. It is remarkable that underwater basic structures are
still left behind on the seabed. Although we have not confirmed, it would be natural that
the underwater basic parts be preserved in situ. Nobody can mention this information.
Though Board of Education of Yokosuka city seems unaware of the fact, these remains
are underwater cultural heritage. These remains were constructed about 120 years ago.
These structures should be valued as not separate remains but integral part of the third
Kai-hou. Such an understanding would enable us to learn the actual conditions of
marine engineering works. However, it seems difficult that we implement archaeological
researches to confirm the actual state. Because the sea area of the third Kai-hou is
important point due to heavy traffic, and the depth of water is about 40 m. Accordingly
we require the authorities to recognize underwater basic remains.
Conclusion
At the opening of a NHK TV program (August 31 of 2013) titled “Megaquake: the revival
of Great Kanto earthquake,” “an artificial island” from the sky view was introduced as a
marine important place for seismic observation or anti-terrorism policy. Seemingly the
9

�foundation of the island was covered with sand, so never did we dream that the island is
underwater cultural heritage. However we assert the island is none other than the
second Kai-hou. The fact that this historically important island was introduced as quite
different island seems to have changed even the original value of the island. The
construction technology of Kai-hous under turbulent times in the early years of Meiji era
was excellent enough to have been required the transfer to the United States when it
planned to construct Kai-hou in Chesapeak bay (Committee for Publishing a
Construction History of Tokyo bay the third Kai-hou, 2005). A document titled “Matters
respecting the construction of Kai-hou in Tokyo bay: An inquiry from US ambassador”
(July 1906) was found in Diplomatic Archives of the Ministry of Foreign Affairs of Japan.
Japan inquired whether US also own the document in reply. That’s why an unknown
history between Japan and US was revealed. In July 2003, Tokyo Bay Waterway Office
found the official document in the US National Archives and Records Administration.
These facts show that an appraisal which Japan solely devoted itself to import is not
necessarily right. Japan had already exported the world highest level of technology to
the US at that time.
Yokosuka city consulted with the Agency for Cultural Affairs in May 2013 to designate
Saruis land as national historic site based on Act on the Protection of Cultural
Properties. The city has been trying to maintain it as a park since it was transferred
from the government in 2007. As Takahashi and Kosaka pointed out, if we regard a
body of batteries including Kai-hous as one package “in totality”, the designation of only
one part as historic site could also contribute to “the totality” provided in the World
Heritage Convention. A statement on national historical site submitted to the Agency for
Cultural Affairs in 2014 is expected.
References
The Asahi Shimbun., August 25th, 2007, (in Japanese).
The Asahi Shimbun., November 12th, 2009, (in Japanese).
The Asahi Shimbun; Chiba(Ed.), July 29th, 2010, (in Japanese).
Odawara Modern History Study (Ed.), 2012.Regional History of the South Kanto in Early
Modern Japan: from the Perspective of Sun-Zu-So. Iwata Shoin, Tokyo, (in Japanese).
Kosaka, K., 2004. Response of the Futtsu city to Tokyo bay Kai-hou. Journal of Tokyo
10

�Bay Science, Vol.2 (2): 65-66, (in Japanese).
Tokyo Bay Waterway Office (Ed.), 2003. Mio (Fairway): the Changing Tokyo bay. Tokyo
Bay Waterway Office, Yokosuka, (in Japanese).
Committee for Publishing a Construction History of Tokyo bay the third Kai-hou (Ed.),
2005. Construction History of the third Kai-houin Tokyo bay. Tokyo Bay Waterway
Office, Yokosuka, (in Japanese).
Tokyo Bay Waterway Office (2013). Homepage, retrieval December 15, 2013.
Fromhttp://www.pa.ktr.mlit.go.jp/wankou/jigyou_syoukai/dai2kai.htm.
Liberal Democratic Party of Chiba (Ed.), January 14th, 2008. To Register the first and
the second Kai-hou on the World Heritage List, Yoshimoto Mitsuru Prefectural
Assembly Report, Chiba, (in Japanese).
Liberal Democratic Party of Chiba (Ed.), February 1st, 2011. Revetment Repair
Construction of the second Kai-hou is Being Enforced, Yoshimoto Mitsuru Prefectural
Assembly Report, Chiba, (in Japanese).
Johoji, A., 1971. Fortification History in Japan. Hara Shobou, Tokyo, (in Japanese).
Takahashi, S., 2002. KyouSho(a memorial writing) for Professor Numata Makoto, the
Chairman of the Society for Tokyo Bay Science. Journal of Tokyo Bay science, Vol. 1
(6): 184-85, (in Japanese).
Takahashi, S., 2004a.A Thought on Kai-hou viewed Tokyo Bay Science. Journal of
Tokyo Bay science, Vol. 2 (2): 48-49, (in Japanese).
Takahashi, S., 2004b.the Cape Futtsu is Kai-mon (sea gate) of Tokyo Bay.
Journal of Tokyo Bay science, Vol.2 (3): 108, (in Japanese).
Chiba Prefectural Board of Education (Ed.), 2000.A Distributive Map of Buried Cultural
Property in Chiba (4 volumes), Nagareyama, (in Japanese).
Nagai, N., 2013. Shinagawa Daiba as Underwater Cultural Heritage. Asian Research
Institute of Underwater Archaeology (Ed.), The Database of Underwater Cultural
Heritage and Promotion of Underwater Archaeology: the Pacific Ocean. The Asian
Research Institute of Underwater Archaeology, Fukuoka, (in Japanese).
Futtsu City Board of Education (Ed.), 1987.the Distribution Map of Buried Cultural
Property in Futtsu city. Futtsu, (in Japanese).
Yokosuka City (Ed.), 2009. The New History of Yokosuka City: Special Edition Cultural
11

�Heritage. Yokosuka City, (in Japanese).
Yokosuka City (Ed.), 2012. The New History of Yokosuka City: Special Edition Military
Affairs. Yokosuka City, (in Japanese).

Biography
Tatsuya Nakada (b. 1969) is an associate professor of Graduate School of
Tokyo University of Marine Science and Technology. He is a member of the
board of Association for regional and Cultural Studies. His specialty is
International Law, inter alia Law of the Sea. His main themes most particularly
include “Fishery Subsidies and International Fisheries Law” and “Archaeological
Heritage Management and UNESCO Convention on the Protection of the
Underwater Cultural Heritage”. In the process of emerging of international
community laws, recently he has been always considering how well such laws
should be incorporated into Japanese legal system.
Toshiaki Hayashibara (1960) has completed master's degree at Graduate
School of Literature of Toyo University. He is a member of the board of Asian
Research Institute of Underwater Archaeology. His specialty is archaeology; his
main themes include Japanese prehistory bronze ware research, underwater
cultural heritage and Archaeological Heritage Management. In the process of
participating in underwater cultural heritage research all over Japan, he has most
gradually come to have his doubts about treatments of underwater cultural
heritage by Japanese management of archaeological heritage. Recently he has
been actively giving presentations on underwater cultural heritage and
Archaeological Heritage Management.

12

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                <text>The Cultural Property of Military Forts on the Sea or Kai-hou in Tokyo Bay: From the viewpoint of underwater cultural heritage </text>
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                <text>At the end of the 19th century the Japanese government built several military forts on the sea or artificial islands inside Tokyo bay in order to defend its capital from foreign sea powers. Three outer forts or Kai-hou, which were between the cape of Kannon, the cape of Huttsu, and Saruis land, formed the first naval defensive line. The first fort started to be constructed in 1881, and then finished in 1890. The second was built between 1889 and 1914, and the third between 1892 and 1921. Among three, only the third one does not exist anymore. In 2000 the governmental demolition project of the third fort began mainly because of the congested seaborne traffic, and was completed in 2007. During the work, some of its building materials were salvaged, which have been exhibited in a city park since 2006; they are now Yokosuka-City-Designated Important Cultural Properties. The underwater structures of the fort were also removed and reconstructed in a council owned ground; in 2013 they were also registered as the above-mentioned cultural properties. On the other hand, the first fort is now owned and charged by the ministry of finance and the second by the ministry of land, infrastructure, transport and tourism. Although both have already been registered as Sites Which Contain Buried Cultural Properties by the local educational committee, the governmental restoration work of the second fort is under way without any legal procedures in conformity with the Japanese domestic law of Act on Protection of Cultural Properties.</text>
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                <text>Tatsuya Nakada</text>
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                <text>Toshiaki Hayashibara, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.)</text>
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                    <text>Submerged Archaeological Sites in the Lake Biwa, Japan

Hisashi Nakagawa
University of Shiga Prefecture
Hikone
Japan, 522-8533
Email: nakagawa134@gmail.com
Abstract
Lake Biwa, the largest in Japan, is in the heart of Shiga Prefecture, occupying an area
of 670 square kilometers. Because the lake has about 4,000,000 years of history, it has
been closely related to local people's everyday lives which have largely depended upon
its freshwater and fishery resources. In addition, it has served as a strategic zone for
waterborne transportation for many years in Japanese chronicles. According to an old
proverb, those who succeed in controlling Shiga Prefecture could reign the world.
Geologically, on the other hand, the poor subsoil of the lakeside has frequently caused
large-scaled landslides by earthquakes, as well as the high fluctuation of the water level
and strandline due to climate change; many villages and settlements are said to have
been submerged beneath the lake.
At present, as many as 90 underwater
archaeological sites have already been identified in the Lake Biwa by the researchers.
Those sites vary in type; from shell mounds during the prehistoric era to material
remains of dwellings or bridge piers of the modern period. As a leading research body,
the Shiga Prefectural Association for Cultural Heritage and academic organizations
such as the University of Shiga Prefecture have long investigated and researched these
areas. Here we present the newest research results with some future plans for
preserving the archaeological sites around Lake Biwa in order to inform the world
academic circle of them.
Keywords: Japan, Underwater archaeology, Lake Biwa, Shiga, Earthquake

Introduction
Lake Biwa is the largest and oldest lake in Japan.

It occurred in the Ueno basin

approximately 60 km away from where it lies today, moved by sedimentation and
diastrophism over 4 million years ago. About 400,000 to 300,000 years ago, it arrived at
its current position. The Lake had never been connected to the sea in history, and a
rich and unique ecosystem exists. There are more than one thousands of animals and
plants that inhabit the ecosystem and the many endemic species exist here now. Many
people gathered these resources for a long time.

More than 90 underwater

archaeological sites are known (Fig. 1), and it becomes approximately 120 sites if
1

�incorporated with lakefront ones.

About half of

those sites is from the Jomon period (Prehistoric
era in Japan). Huge shell mounds are found here
therefore people at the time strongly depended
upon the Lake. In the historical age, Lake Biwa
comes to play a socially important role due to its
geographical characteristics.

Mainly, it links the

capital city (Kyoto) to the eastern and northern
country. One must travel through the Shiga
Prefecture to go between the two areas and cross
the “Kara-bridge”. In many cases, the bridge was
often reconstructed over the years, and it is
Fig. 1 Distribution Map of the Sites. discovered through excavation and old historical
(H. Nakagawa)
documents. However, water transport was the most

important means for carrying supplies and materials, therefore, many ports flourished
and a lot of people and information came through here from all over the country. From
such a social importance, it was said that those who succeed in controlling Shiga
Prefecture could reign the world and persons of power always put this lake under their
control. For example, the ancient government constructed large barrows (an ancient
burial mound, square at the front and rounded in the rear) near the lake, and made it
local symbols (Youda, 2007). Nobunaga Oda (1535-1582) who was the most famous
person living in the Age of Civil Wars constructed the Azuchi-Castle in the shore
mountain as a base of the national unification. Similarly, he made vassals construct
castles (Sakamoto-Castle, Nagahama-Castle, and Oomizo-Castle), and ruled the water
transport (Nakai, 1997). Of course, many ordinary people gathered and established
villages and engaged in fishery and transport and others. On the other hand, the poor
subsoil of the lakesides has frequently caused large-scale landslides by earthquakes
and many villages and settlements are said to have been submerged beneath the lake.
In addition, approximately 460 rivers flow into this lake, but its only discharge is the
Seta-River; therefore, the water level is greatly fluctuated by the sedimentation situation
of riverbed.
2

�The History of the Underwater Archeology around Lake Biwa
In Japan, underwater archaeology lags behind compared with other maritime nations.
However, the Shiga Prefecture is known as an area where the concern is exceptionally
high. The history of the Shiga Prefecture’s underwater archaeology can be divided into
3 terms.
Term Ⅰ: Pioneering Studies (From Early Modern times to 1960s)
In Japan, concern about underwater cultural heritage goes back to the Edo period. The
Edo period is the early modern times of Japanese history (1603-1868). Mr. Sekitei
Kiuchi was a collector of unusual stones and came from Shiga Prefecture. While
recording the collected stones in his writings a stone spear was given to him. The spear
was raised by fisherman, and this record is the first concern about the underwater
cultural heritage of Japan. The first academic concern is in 1928. Prof. Sadahiko
Shimada had been set out to examine the origin of underwater archaeological sites; for
example, the Tsuduraosaki-bottom site is well-known (Shimada, 1928). After that, Ph.D.
Yoshio Oe rendered distinguished service. He was from Shiga Prefecture and made an
effort for prevention of the scattering of relics raised from the Tsuduraosaki-bottom site.
Moreover, he introduced underwater archeology to Japan for the first time, and typified
underwater archaeological sites (Oe, 1950). As a result of these achievements, he is
known as the "Father of Underwater Archaeology of Japan". As previously stated, the
Tsuduraosaki-bottom site attracted attention most in those days. This site is unique; it is
at a depth between 10 and 80 m, but almost all of other sites are between 1 and 10 m.
Incidentally, the water level is converted into the standard water level (T. P: 84.371 m)
because it keeps changing every day in Lake Biwa. In 1924, at the end of the Taisho
period, Jomon wares (straw-rope pattern pottery) were raised by fisherman, which
interested archaeologists. In addition, Yayoi period potteries and ancient potteries,
dating between approximately 2,800 to 900 years ago, were raised. Approximately 140
potteries were recovered presently, and many complete shapes are included. Various
hypotheses about origin of this site are suggested. For example, (a) The hypothesis
that land sites were washed out by a rise in water level, (b) The hypothesis of pottery
being thrown away that was used in facilities on the lakefront, (c) The hypothesis to be
burial at sea, (d) The hypothesis that the ground sank by an earthquake, however, the
3

�issue is not yet settled (Shiga Prefectural Azuchi Castle Archaeological Museum, 2009).
TermⅡ: Progress of the Investigation and Study with Lake Biwa Comprehensive
Development Program (Since 1972 to 1997)
The Lake Biwa Comprehensive Development Program was carried out for the purpose
of exploring water resources and the maintaining the social infrastructure.

They

constructed a breakwater and dredged for a lake-line. However, it was evident that
many underwater archaeological sites will be destroyed by these developments;
therefore, many investigations were carried out by Shiga Prefectural Association for
Cultural Heritage.

Many techniques were accumulated in these investigations, for

example, excavation via airlift, and underwater photography greatly contributed to the
development of underwater archaeology in
Japan. The investigation method was to make
the underwater sites dry up using steel boards
and a drainage pump, labelled as the "Lake
Biwa method" produced especially good results
(Fig. 2). Finally, more than 200 investigations
were carried out over a total excavation l area
of 240,000 square kilometers.

Fig. 2 Excavating by "Lake Biwa Method" in
The Awazu-bottom site is one of the most Harie-Shore Site. (Shiga Prefectural Azuchi
Castle Archaeological Museum)

famous sites that were excavated at this time
by the "Lake Biwa method". This site is the largest fresh water shell mound in Japan,
and located in depth of water of approximately 2 to 3 m. Three shell mounds are known,
but only the No. 3 shell mound was excavated. All shells, earth and sand were sorted
by floatation; therefore, small remains were collected in this manner. The site is mainly
attributed to the early phase of the middle of Jomon period (ca. 4,500 BC). As well as
shellfish and animal bones, many foodstuffs were excavated. For example, there are
nuts such as chestnut and buckeye, plants such as gourd and perilla which form a layer,
therefore a lifestyle of hunting and gathering was restored.

In addition, organic

materials such as net baskets, lacquering products and earthenware vessels of various
parts of Japan were recovered. As a result, the Awazu-bottom site became an historical
source of the highest value in the Jomon period (Shiga Prefectural Association for
4

�Cultural Heritage, 1997).
The Kara-bridge site located on the bottom of Seta-River is the only river flowing out of
the lake. Excavation and research was carried out by the "Lake Biwa method". The
bridge piers were discovered during this excavation research, and as a result of
studying, it was found that the remains of that stage are from the Zinshin-Civil-War (672
AD); it was the biggest war in Japanese ancient history. After that, other remains were
confirmed off the coast and a full-scale excavation by the diving team was carried out
from a view of flood prevention and the ship navigation. As a result of this, the bridge
piers, including the Nara period (710-794 AD), the Kamakura period (1185-1333 AD),
the Muromachi period (1336-1573 AD), and the Edo period were excavated.

This

bridge was a strategic point which connects the eastern and northern country to the
capital city (Kyoto) since ancient times, and old historical documents inform us that the
bridge was a battle setting many times over; these descriptions were supported by
excavation and research (Shiga Prefectural Association for Cultural Heritage, 1992).
The Harie-shore site, located 200 to 400 m off of the lakefront, was considered mainly
an early Yayoi period site.

The Yayoi period (ca. 300 BC-250 AD) is one of the

prehistoric eras in Japan next to the Jomon period. In the investigation, a full picture of
village was excavated and the discovery of the earthquake traces attracted attention.
The earthquake was estimated at a magnitude of approximately 7.5, with sand boiling
and liquefaction phenomena destroying the remains; this is regarded as reason for the
village extinction (Shiga Prefectural Association for Cultural Heritage, 1990). The
Akanoi-bay sites locate from lakefront to bottom of the lake. Approximately 80 pieces of
tiles, old coins, and other items were excavated from the lakefront, and these remains
date to the Asuka period (592-710 AD). It is thought that this site resembles a loss of
cargo or a sinking of the ship were made this situation since almost all tiles were
unused and heaped up.

There are few sunken ships in this Lake except for the

prehistoric times; therefore, this site is important for looking into ancient water transport
(Shiga Prefectural Association for Cultural Heritage, 1998).

5

�TermⅢ：After the Lake Biwa Comprehensive Development Program (Since 1992
～)
A variety of investigative organizations did work here after the Lake Biwa
Comprehensive Development Program. In particular, the investigation conducted by the
University of Shiga Prefecture is important.

Lake Biwa has legends; villages and

settlements that once existed here yet now
submerged on the bottom of the lake. PhD
Hiromichi

Hayashi had

legends since 1992.

investigated

the

For example, the

Naoesengen site was portrayed in old
drawing in 1291 (Kamakura period), and it
was traced to the Edo period (Fig. 3).
Currently, a part of the land disappeared,
therefore it is said that it sank down by an Fig. 3 Old Drawing of Naoesengen Site and its
earthquake.

In his research, for example, Environs. (T. Hayashi and others)

pottery and tiles of the 12th century were recovered. In addition, a barrow from the 7th 8th centuries and the wreckage of the stone wall in the 18th century was discovered
from a depth between of 1.4 m to 4.1 m. The existence of barrows were portrayed in
the old drawing, therefore the discovery was the important evidence for proving the
legend. At the same time, PhD Toshitaka Kamai (Disaster Prevention Research Institute
Kyoto University) and Assoc. PhD Tsuyoshi Hraguchi (Graduate School of Science /
Faculty of Science Osaka City University) carried out the joint investigations, and as a
result of this, traces of the earthquake were confirmed from on the land and bottom of
the lake.

The same traces were confirmed from other sites, for example

Shimosakahamasengen site and Mitsuyasengen site.

It made clear that many

underwater archaeological sites on the bottom of Lake Biwa were formed by local
landslides (Lateral Flow – Ground flow due to liquefaction) that occur due to
earthquakes.
In addition, these investigations were important activities for educational institutions.
Currently, there are few institutions where students can learn underwater archaeology in
Japan. Nevertheless, students have participated as staff in these investigations, and the
6

�author received a degree in the discipline since a university admission. As a result of
such steady instructional activity, a research group with which author acts as a
representative continues this investigation.
As other example, Okinoshiraisi, a remote and lonely rock island, was investigated by
ARIUA (Asian Research Institute of Underwater Archaeology) and Research Institute of
Underwater Archaeology. The island is located at the center of Lake Biwa, therefore,
sailors had regarded it as traffic sign since ancient times.

Currently, the clear

archaeological remains have not been found, yet future study on the island is expected.
In addition, a joint-investigation by PhD Kenichi Yano (Archaeology) and PhD Sadao
Kawamura (Engineering) of Ritsumeikan University was carried out in the Tsuduraosakibottom site. It attracted a significant amount of attention since the investigation is
connected with advanced robot development and technology.

Fig. 4 The Exhumation Situation of Glazed
Pottery of the Early 10th Century. (H.
Nakagawa)

Fig. 5 The Exhumation Situation of a Part of FiveRing Pagoda.
(H. Nakagawa)

A Short Study of the Legends of Submerged Villages
The East Japan Earthquake Disaster, which occurred on March 3, 2011 made scholars
research the remains of the disaster and investigate old historical documents about the
natural disaster. Because of this, the legends of submerged villages attract attention. I
would like to show materials based on the latest investigation, and perform a short study.
The Society for Underwater Archaeological Sites in Lake Biwa, was inaugurated in 2011
by graduate and university students, and has been dedicated to the investigation of the
Nishihamasengen site. The site has a legend; a village called Nishihama existed here
7

�once, but it was submerged in the bottom of Lake Biwa by a severe earthquake
between 1460 to 1466 CE. We performed the site survey by scuba diving and skin
diving, and finally, investigated offshore 250 m, a range of lakefront line approximately
800 m, at a depth of approximately 1 to 2 m. At present, more than 200 pieces of
pottery (Fig. 4), the wreckages of pillars, and a graveyard of the medieval period have
been found. The pillars are considered to be what once was fences and sheds
(Nakagawa, 2012) (Nakagawa, 2013). The fences were made not only with timbers but
with bamboo, and the buildings were made with only timber. Additionally, all of timbers
were thin; less than 10 cm in diameter, which is a notable peculiarity. As the reason for
this, it is believed that the buildings were not houses, but were sheds. We will carry out
an additional investigation in the near future, to examine it in greater detail. The extent
of graveyard area is 38 m in the east-west direction and 26 m in the north-south
direction, and there are approximately 16 simple graves and that were constructed by
rocks and stones. The stone statue, Amitabha Tathagata and a part of Five-ring pagoda
(Fig. 5) was found, made by granite and a small plate of unglazed earthenware was
offered on the graves. In addition, household goods, big earthenware pots and
earthenware mortars and other material were excavated. The materials indicating the
last period of this site are earthenware goods and stone statues; the last settlement
patterns date the site to is the latter half of 15th century to early 16th century. From
these result, I would like to examine the origin of this site. The water level in the 15th
century to 16th century is considered to be 84 m to first half of 85 m (Hayashi, H.,
Kamai, T., and Haraguchi, T., 2012). The graveyard and pillars are located at 83.1 m
above sea level or less, in addition, the remains of the houses built on piles in lakes are
not prevalent in this region. Therefore, same as the legend, it is regarded that this
village, which was on the land, was submerged via ground change caused by an
earthquake. However, the year that an earthquake occurred seems to be different from
the legend. According to the legend, the Nishihamasengen site submerged into bottom
of the lake in the middle of the 15th century, yet, relics of the 16th century were
recovered.

Because of this, when we corroborate the old historical documents, a

severe earthquake which is estimated to be magnitude 7.8 in 1586 was written down;
swas called the Tensho-Severe-Earthquake, and occurred on January 18, 1586 (Iida,
8

�1987). According to the documents, there were 1000 houses in this region. Half of the
houses were destroyed by fire, and the other half were destroyed by collapse, therefore
it is assumed that the Nishihamasengen site was caused by this earthquake. Many sites
which were damaged by this earthquake were investigated.

For example, the

Shimosakahamasengen site, located to southeast 2.2 km of the Nishihamasengen site,
was caused by the earthquake and in past investigations and old photographs, remains
of submerged wells, and withered Japanese cedar via submergence were observed.
Additionally, a part of the Nagahama-Castle, located between Nishihamasengen site
and Shimosakahamasengen site, was submerged by this earthquake, and was
recorded in old historical documents. As a result of these, the possibility that a largescale landslide occurred over more than 2.2 km of the lakefront line and more than 500
m offshore is arguable. However, such a historical disaster record is not reflected by
former disaster prevention plans. This is an important problem about the disaster
prevention for not only Shiga Prefecture but also all of Japan due to our large shoreline.
Problems and Prospects
As mention above, many sites have been investigated for many years in Lake Biwa, and
Shiga Prefecture is admired as an advanced area of underwater archaeology in Japan.
However, the area still has many problems. Some examples will be highlighted below,
as well as addressing some of the future plans for the area. At first, the problems about
the research organization exist.

There is no public research organization and

technically no research worker who works on the underwater archaeology in Shiga
prefecture now.

In other words the current

investigations are carried out by a few
university teachers and graduate students. In
connection with this, educational problems
exist. There are few universities which teach
underwater archaeology in Japan, and there
is even no course offered in Shiga Prefecture.
The investigation by the University of Shiga
Prefecture is outside the regular academic Fig. 6 Current Condition of Nagasone-Port Site.
curriculum, and it is carried out by the author
9

(H. Nakagawa)

�and volunteer students; therefore the longevity of the program is in danger.
The legal recognition of sites is a concern as well. For example, the initial sites survey
is a basic excavation for material and research when sites are threatened by
development. Sites that are not registered as such, excavation cannot be conducted.
In Shiga Prefecture, many underwater archaeological sites are registered more than
other local self–governing bodies; nevertheless, there is an imbalance between
registered and unregistered sites. For example, most of the port sites which can be
dated to a period by old historical documents are not registered. One example among
many is the Nagasone-port site located in Hikone City. There is at least one breakwater
remnant and five pier remnants 1 kilometer away from Hikone Castle. We can confirm
their appearances easily when we look around Lake Biwa from the lakefront (Fig. 6). It
is considered that a part of these were constructed in the early Edo period from the old
historical documents, but it is not recorded on the site register. Needless to say, Japan
has not ratified the Convention on the Protection of the Underwater Cultural Heritage;
therefore there are many positions between each local self–governing bodies where
they recorded on modern period sites.

Registering sites dated to after the early

modern times are entrusted to local self–governing bodies. Nevertheless, Hikone City
aims at making Hikone Castle a World Heritage, and it was asserted that they are a
castle town as well as a castle (Hikone City HP). However, it is problem that even the
Nagasone-port site, which is clearly part of castle town, was not recorded as a site. It is
clear from this example that underwater archaeological sites are held to a lower regard
than land sites.
Yet all is not lost, things look like they are moving forward positively. For example,
associated old historical documents about Lake Biwa are being compiled, and research
is being conducted. Many sites exist in the shallows at a depth between 1 and 5 meters.
Because of this, we are able to investigate these sites easily by skin diving or beach
diving. The shallower the water, the more we can ensure safety, meanwhile, the basic
techniques do not change with the depth. Accordingly, I think Lake Biwa a great area to
learn the technical aspects of underwater archaeology. The establishment of a longterm study system by the public institution is necessary in the future, and a cooperation
system with an organization inside and outside of the prefecture will be necessary, as
10

�well.
Conclusion
Until recently, underwater archaeology had not been recognized sufficiently as a field of
archaeology, in Japan.

However recently, it is attracting attention because of the

discovery of sunken Mongolian Invasion Ships in the Takashima-Kouzaki site. Taking
advantage of this, it is expected that Japanese underwater archaeology will develop
greatly. Lake Biwa is the field which has been known since the old days in Japan but it
is almost obscure worldwide. However, many sites exist in the area, therefore it an
indispensable field for developing the Japanese underwater archaeological program. It
is an unexpected delight if I can tell the attraction of Lake Biwa to world researchers
through this paper.
Acknowledgment
I wish to express my appreciation for Prof. Dr. Akifumi Iwabuchi, Prof. Tatsuya Nakada,
and the Publications Committee of APCONF 2014, as they gave me the opportunity of
writing this article and of presenting it in Hawaii.
References
Hayashi, H., Kamai, T., and Haraguchi, T., 2012. The Sunken Villages on the Bottom of
Lake by Earthquakes. Sunrise-shuppan, Shiga (in Japanese).
Iida, K., 1987.

The Archives of Tensho-Severe-Earthquake. Nagoya-daigaku-

shuppankai, Nagoya (in Japanese).
Nakagawa, H., 2012. Summary Report of Nishihamasengen Site. In Kamei, W., Takeda,
S., Yamane, S., Hirose, J., and Oohashi, M (Eds.), Human Cultures, Vol. 31. The
University of Shiga Prefecture School of Human Cultures, Shiga (in Japanese): 60-69.
Nakagawa, H., 2013. Natural Science Analysis of Nishihamasengen Site. In Kamei, W.,
Miyao, M., Hirose, J., Oguri, Y., and Oohashi. M., (Eds.), Human Cultures, Vol.33. The
University of Shiga Prefecture School of Human Cultures, Shiga (in Japanese):73-82
Nakai, H., 1997. The Castles in Omi. Sunrise-shuppan, Shiga (in Japanese).
Oe, Y., 1950.

Introduction into Prehistoric Potteries on the Bottom of Lake Biwa.

Gakuzidou-shuppan, Kyoto (in Japanese).
Shiga Prefectural Association for Cultural Heritage., 1990.
Excavation Research in 1989, Shiga (in Japanese).
11

Summary Report of

�Shiga Prefectural Association for Cultural Heritage., 1992. Kara-Bridge Site. Shiga (in
Japanese).
Shiga Prefectural Association for Cultural Heritage., 1997. Awazu-Bottom Site No.3
shell mounds, Shiga (in Japanese).
Shiga Prefectural Association for Cultural Heritage., 1998. Akanoi-Bay Site. Shiga (in
Japanese).
Shiga Prefectural Azuchi Castle Archaeological Museum., 2009.

The World of

Underwater Archaeolog,. Shiga (in Japanese).
Shimada, S., 1928. The Prehistoric Omi. Meicho-shuppan, Tokyo, (in Japanese).
Youda, M., 2007. The Barrows and the Many Groups of Barrows Surround with Lake
Biwa. Sunrise-shuppan (in Japanese).
Hikone City (2013). Hikone City Homepage. Retrieval December 15, 2013. From
http://www.city.hikone.shiga.jp/hikonejo/heritage/houkoku.html.
Biography
Hisashi Nakagawa was born in Aichi Prefecture in 1988. During the undergraduate
level, he learned underwater archaeology and was supervised by Prof. Hiromichi
Hayashi at the University of Shiga Prefecture (2007-2011). Prof. Hayashi did study
underwater archaeology from Prof. Yoshio Oe, who is respected as the "Father of
Underwater Archeology in Japan". With the retirement of Prof. Hayashi, he has
succeeded to the research around Lake Biwa since 2011. In 2013 he completed the
master program (Human Culture) at the University of Shiga Prefecture, and then since
2013 he has been a PhD candidate in the same university, and a Research Fellow of
the Japan Society for the Promotion of Science.

12

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                <text>Lake Biwa, the largest in Japan, is in the heart of Shiga Prefecture, occupying an area of 670 square kilometers.  Because the lake has about 4,000,000 years of history, it has been closely related to local people's everyday lives which have largely depended upon its freshwater and fishery resources.  In addition, it has served as a strategic zone for waterborne transportation for many years in Japanese chronicles. According to an old proverb, those who succeed in controlling Shiga Prefecture could reign the world.  Geologically, on the other hand, the poor subsoil of the lakeside has frequently caused large-scaled landslides by earthquakes, as well as the high fluctuation of the water level and strandline due to climate change; many villages and settlements are said to have been submerged beneath the lake.  At present, as many as 90 underwater archaeological sites have already been identified in the Lake Biwa by the researchers.  Those sites vary in type; from shell mounds during the prehistoric era to material remains of dwellings or bridge piers of the modern period.  As a leading research body, the Shiga Prefectural Association for Cultural Heritage and academic organizations such as the University of Shiga Prefecture have long investigated and researched these areas.  Here we present the newest research results with some future plans for preserving the archaeological sites around Lake Biwa in order to inform the world academic circle of them. </text>
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                    <text>First Discovery and Mapping of Early Modern Grapnel Anchors in Ishigaki Island
and Cultural Resource Management of Underwater Cultural Heritage in Okinawa
Rintaro Ono
Tokai University
Shizuoka
Japan, 424-8610
Email: rintaro@tokai-u.jp
Hironobu Kan
Okayama University
Okayama
Japan, 700-8530
Email: kan@cc.okayama-u.ac.jp
Norimitsu Sakagami
Tokai University
Shizuoka
Japan, 424-8610
Email: sakagami@scc.u-tokai.ac.jp
Masayuki Nagao
National Institute of Advanced Industrial Science and Technology
Tsukuba
Japan, 305-8567
Email: nagao-masayuki@aist.go.jp
Chiaki Katagiri
Okinawa Prefectural Museum and Art Museum
Naha
Japan, 900-0006
Email: katgiric@pref.okinawa.lg.jp
Abstract
Yarabuoki site, which contains iron grapnel anchors and early modern Okinawa ceramic
jars in 12 to 32 m depth off the western Coast of Ishigaki Island, was discovered by a
local diver and reported to Okinawa Prefectural Archaeological Center. In 2010, the
Center conducted a distributional survey to confirm the site and its location. Although
the survey found and pictured seven numbers of grapnel anchors that were first findings
of this type in Okinawa area, the previous study did not record each position and the
accurate depth of these artifacts and the site character such as shipwreck site or
discarded shipping loads site is yet unclear. With such background and tasks, our team
has conducted underwater archaeological research to record each location of grapnel
anchors and ceramic jars using GPS. Furthermore, Kan and Nagao conducted a
broadband multibeam survey around the Yarabuoki site and visualized the bathymetric
1

�results at a lateral grid resolution of 1m. This will enable us to create a threedimensional site map to plot the artifacts, while Sakagami (Tokai University) developed
a low-cost and human-portable underwater robot to explore and record high resolution
video of underwater sites, and the robot successfully worked during our surveys. Our
paper reports the results and outcomes of the research at Yarabuoki site and other
underwater sites in Ishigaki and the Yaeyama Islands and discusses the early modern
marine transportations in Okinawa or the Ryukyu Islands. We also discuss the future
possibility for cultural resource management of underwater cultural heritages in the
Yaeyama and Okinawa.
Keywords: Broadband multibeam survey, Okinawa, Yaeyama Islands, Yarabeoki site,
Grapnel anchors, Cultural resource management

Introduction
The Academic and social interests on underwater cultural heritage is currently
increasing in Japan. In 2011, for example, the Takashima site in Nagasaki Prefecture
(in Kyushu Island) where the 13th century original Yuan ships from China were firstly
discovered became the first National historical heritage of an underwater site. In such
current movement, one of the hottest areas with increasing number of underwater
archaeological surveys and underwater cultural heritages is Okinawa or Ryukyu
Archipelago. The archipelago consists of 199 islands of various sizes and ranges about
1,200 km between Kyushu Island at its north end and Taiwan in its south end (see also
Katagiri et al., in this volume). In fact, in the past 10 years surveys and researches by
Kagoshima University and the Nansei Islands Underwater Cultural Heritage Study
Group (2010, 2011), the Okinawa Prefectural Archaeological Center, the Okinawa
Prefectural Museum and Art Museum (e.g. Katagiri 2007, 2009, 2010; Miyagi et al.,
2005), and the Asian Research Institute of Underwater Archaeology (2013) have
discovered and confirmed over 100 of underwater archaeological sites in relatively good
condition. Yarabuoki site in Ishigaki Island is one of these newly discovered sites. The
site produces a total of seven iron grapnel anchors and early modern Okinawa ceramic
jars in 12 to 32 m of depth off the western coast of Ishigaki Island, which is the most
populated island with the local capital city in the Yaeyama Islands (Fig. 1). Other major
islands in the Yaeyama Islands are Iriomote Island, Taketomi Island, and Kuroshima

2

�Island

etc,

and

other

underwater

archaeological sites are located off the
coast of these islands (see also Fig. 1).
In this paper, we report the recent
results and outcomes of our underwater
archaeological research at Yarabuoki
site and discuss the early modern
maritime transportations in Okinawa or
the Ryukyu Archipelago. We also report
and discuss our practices on cultural 1 Fig. 1 Locations of Underwater Archaeological
resource management of underwater Sites in the Yaeyama Islands. (R. Ono)
cultural heritages in the Yaeyama Islands and Okinawa.
Discovery and Mapping of Yarabuoki Site
In 2009, Yarabuoki site was firstly discovered by a local professional diver (Mr. Seiji
Fujii) who has operated diving services over 30 years in Ishigaki Island. He reported
the location of this site to the Okinawa Prefectural Archaeological Center. In 2010,
Katagiri (2010) conducted the first survey as the chief investigator from the Center with
assistance of the Nansei Islands Underwater Cultural Heritage Study Group (2011) to
confirm the total of seven iron grapnel anchors of various sizes and numbers of early
modern Okinawa pottery jars (Tsuboya-Yaki) in 2010. However, these previous surveys
did not measure the detail location of each anchor and pottery jars, hence it was
discussed whether the site could be classified as a sort of port/anchorage site or
possible shipwreck site. In terms of dating the site, we could roughly estimate these
artifacts belong to the early modern times between the 17th to 19th centuries (mainly
Edo period in Japan), though it was hard to provide an exact date of these artifacts.
With these background and research questions, we have conducted an interdisciplinary
underwater research with multiple methodologies including GPS position coordinating
and archaeological analysis of each artifact (Ono and Katagiri), a broadband multibeam
survey searching (Kan and Nagao), and recording high-resolution video of the site and
survey

progress

by

a

human-portable

underwater

robot

(Sakagami).

This

interdisciplinary research is part of the larger-scale study project “Coastal Area
3

�Capability
Enhancement

in

Southeast

Asia”

(headed by Dr. Satoshi
Ishikawa)

by

the

Research Institute for
Humanity and Nature,
Fig. 2 A Human-portable Underwater Robot Made and Used in Our Kyoto, Japan, and the
Research. (R. Ono)

robot

(Fig.

2)

was

originally planned and made for this research project in low-cost value by Sakagami at
Tokai University. Surveys were conducted in November 2012, August 2013, and
November 2013. During these researches, GPS position coordinates and exact depth of
all the seven iron grapnel anchors and the clustered area with ceramic jars were
measured. Table 1 shows each position coordinate and depth of anchors and ceramics,
while Figure 3 is the bathymetric map provided by Geospatial Information Authority of
Japan (GIS) with each location of artifacts plotted. As shown in Figure 3, the GIS
bathymetric map is only mapped in 10m scale level and it is yet hard to locate the exact
position of each artifact with this map. Concerning such mapping problem, Kan and
Nagao conducted a broadband multibeam survey around the Yarabuoki site to visualize
the bathymetric results at a lateral grid resolution of 1m during our research. Although
the complete map is not come out in this moment, such map should enable us to create
a three-dimensional site map to plotting the artifacts in much detail and exact position in
the final stage of our research.
Description

of

Grapnel

Anchors

and

Ceramic Jars
As shown in Figure 3 map, the distribution
area of the grapnel anchors can be mainly
separated into two zones as (1) eastern zone
and (2) western zone. Each zone have about
400 m away in distance, hence it is highly Fig. 3 The GIS Bathymetric Map with Plotted
possible that these seven grapnel anchors Each Location of Artifacts. (R. Ono)
4

�Fig. 4 The Iron Grapnel Anchors in Yarabuoki site. (Y. Yamamoto)
5

�could belong to more than two ships rather than a single ship. Such possibility might be
also supported by the existence of various sizes of anchors in the site. Concerning the
clustered area of ceramic jars, these jars are distributed close to the No. 1, 2, and 3
grapnel anchors, and there might have been any relationships with these anchors and
jars. Here, we firstly introduce the condition and form of each grapnel anchors and
ceramic jars, then discuss the possible age and character of the site from various
aspects.
No. 1 Grapnel Anchor
The size of No.1 anchor shank is 1.97 m in length. All the four arms left in good
condition, while two of them are buried in the sandy bottom (Fig. 4A). The width of joint
base with shank and arm is about 20 cm and its cross section is square size. The width
of shank point is about 15 cm and no arm ring attached.
No. 2 Grapnel Anchor
The size of No.2 anchor is a bit smaller than No.1 as its shank is about 1.8 m in length.
All the four arms left with good condition, while two of them are buried in the sandy
bottom (Fig. 4B). The width of joint base with shank and arm is now surrounded by
corals but its cross section can be estimated as square size. The width of shank point is
about 15 cm with an arm ring attached.
No. 3 Grapnel Anchor
The size of No.3 anchor is much smaller as its shank is about 1.5 m in length. Among
the four arms, two of them are buried in the sandy bottom, while other two are expose
only its point part. Both of these exposed arm points are not complete and broken (Fig.
4C). The width of joint base with shank and arm is now surrounded by corals but its
cross section can be confirmed as square size. The width of shank point is about 15 cm
with an arm ring attached.
No. 4 Grapnel Anchor
The size of No.4 anchor is one of the smallest as its shank is about 1.2 m in length.
Among the four arms, two of them are buried in the sandy bottom, while other two are
expose only its point part. Both of these exposed arm points are not complete and
broken (Fig. 4D). The width of joint base with shank and arm is now surrounded by
corals but its cross section can be confirmed as square size. The width of shank point is
6

�about 15 cm with an arm ring attached.
No. 5 Grapnel Anchor
The size of No.5 anchor shank is 1.6 m in length and almost. Among the four arms, two
of them are buried in the sandy bottom, while other two are exposed in good condition
as complete form (Fig. 4E).

The width of joint base with shank and arm is now

surrounded by corals but its cross section can be estimated as square size. The width
of shank point is about 15 cm with an arm ring attached.
No. 6 Grapnel Anchor
The size of No.6 anchor shank is about 1.65 m in length. Among the four arms, two of
them are buried in the sandy bottom, while other two are exposed only its point part.
Both of these exposed arm points are not complete and broken (Fig. 4F). The width of
joint base with shank and arm is now surrounded by corals but its cross section can be
confirmed as square size. The width of shank point is about 15 cm with an arm ring
attached.
No. 7 Grapnel Anchor
The size of No.7 anchor shank is about 2.05 m in length. Among the four arms, three of
them are exposed in good condition as complete form (Fig. 4G), while another one is
buried in the rocky bottom. The width of joint base with shank and arm is now
surrounded by corals but its cross section can be confirmed as square size. The width
of shank point is about 20 cm with an arm ring (30cm in diameter) attached.
Pottery Jars
As shown in Table 1, these pottery jars locate close from No. 1 to 3 grapnel anchors and
about 20 m in depth. In total of 12 jars are recently confirmed with some variety in size
from about 40 cm up to 100 cm in height. Yet, all of these jars are similar in form and
source material, and can be identified as early modern Okinawa pottery jars called
“tsuboya-yaki” in local name and originally made in Okinawa Island (Fig. 5A). We
measured the detail size and location of all of these jar but did not salvaged and kept
them in the original position except one small jar (Fig. 5B) which was not fixed with coral
or rocky bottom and easily movable. This salvaged jar is now kept in the Okinawa
Prefectural Museum for further archaeological analysis to indentify the original
production location and exact date of these jars.
7

�Fig. 5 The Early Modern Okinawa Pottery Jars in Yarabuoki site. (Y. Yamamoto)

Discussions and Future Perspectives
Early modern maritime transportations in Okinawa
As described and discussed in previous chapters, the seven grapnel anchors are variety
in size and its shape. Among these, No.1 to 4 anchors are basically distributed in
eastern zone with pottery jars, while the other No. 5 to 7 anchors are located in western
zone in the site around 13-32 m in depth. Such distribution patterns of the anchors
tentatively indicate that more than two ships dropped their anchors around the site. In
the Yaeyama Isands, including Ishigaki Island, there is no record of public port in historic
times or during the Ryukyu Kingdom Period (from 1429 AD to 1879), and most of
trading or loading activities were possibly done in off-coast by use of small boats (e.g.
Oohama, 1999). With such situation, large size ships were basically anchored inside
bays such as Nagura bay in western coast of Ishigaki or some anchorage points where
they could avoid strong winds and waves. Yarabuoki site is located in the northern coast
of Yarabu peninsula next to the large Nagura bay is also known as one of these
anchorage points from historic times. In fact, there were some historical records of
anchorage by drifting ships in local historic documents during the 17th to 19th centuries.
Based on these historic facts, these grapnel anchors could belong to ships originally
from Okinawa Island (where the capital of Ryukyu Kingdom located), Satsuma in
8

�Kyushu Island (where had occupied the Ryukyu Kingdom since 1609), or mainland
China (during the Chin Dynasty) to visit in some purposes or drift off by accident to
Ishigaki Island.
However, there were no grapnel anchors discovered or kept in Okinawa except these
seven anchors from Yarabuoki site. This fact can be the possible hint to estimate the
types and origins of ships that equipped or loaded these anchors and pottery jars.
There are no historical records either that mentioning what types of anchors were
equipped with the local ships during the Ryukyu Kingdom period. The major ship types
in Okinawa during the early modern times were “Shinko-sen” as the largest sized junk
typed ship for international trading mainly with China (Ming and Chin Dynasty) and
“Maran-sen” as the middle to small sized wooden ship for domestic trading mainly
inside the territory of the Ryukyu Kingdom. The types of anchor equipped in these ships
are unclear since no historic documents or records were discovered except a drawing of
the old Ryukyu trading port (Naha city) on folding screen in the early 19th century
(owned by Urasoko City Museum). Some Shinko-sen ships and the equipped anchors
were drown in the folding screen, though these anchors are not grapnel and its material
seems like wood and not iron (Katagiri, 2011).
On the other hand, iron grapnel anchors were major anchors for Japanese style wooden
ship called “Kai sen” and “Benzaisen” (sen=ship) during the Edo period after the 16th
century. These early modern ships are usually equipped 6 to 8 different size of iron
grapnel anchors identified as the first anchor to the eighth anchor. The first anchor was
usually the largest, while the eighth anchor was the smallest among them (e.g. Kojima,
2012). For example, the largest sized-class wooden ship “Sengoku sen” (sen=1000,
goku/koku = basic unit of volume used during the Edo period) which had over 278
kL/m3 loading capacity, was usually equipped with a fist anchor of over 2-3 m length
and 300-400 kg weight.
Based on these historical backgrounds and the size variety of Yarabuoki grapnel
anchors between 2.0 to 1.2 m in length, it is possible that these anchors were equipped
with Sengoku-sen class Japanese style wooden ship. Another possibility is visits of
Chinese ships to Ishigaki and other islands in the Yaeyama since the early modern
Chinese ships also usually equipped iron grapnel anchors. However, considering that all
9

�the pottery jars in Yarabuoki site are Tsuboya-yaki as the early modern Okinawa jars
originally produced in Naha City in Okinawa Island, it is highly possible that at least the
No. 1 to 3 grapnel anchors could be equipped with Japanese style wooden ship(s),
probably from Satsuma in Kyushu Island since most of this type of ships in Okinawa
were mainly from Satsuma after 1609 when the Ryukyu Kingdom was dominated by
Satsuma. According to another drawing of the old Naha port on a folding screen from
the 19th century (owned by Okinawa Prefectural Museum), there are some Satsuma
ships equipped with iron grapnel anchor (Katagiri, 2011). Although it is yet unclear in
which types of ships these anchors were used, we estimate some of them could belong
to Satsuma ship(s). For further investigation and dating of these anchors and exact
ships anchored in Yarabuoki, we need much detail analysis including accurate
measuring of each anchor and comparative study of early modern iron anchors in China
and Kyushu particularly Satsuma. In terms of the site type, there are still two
possibilities as (1) the site also contains shipwreck(s) or (2) the site is just scattered
seabed artifacts site with only anchors and pottery jars and no shipwreck (Ono et al.,
2013). Although it is required to discover part of the shipwreck(s) to identify Yarabuoki
as shipwreck site in future study, we consider that the distribution pattern as No.1 to 3
anchors are concentrated with clustered pottery jars in their center position may indicate
the presence of a shipwreck. To confirm such possibility, further surveys including test
excavation around the area are required.
Use and Management of Underwater Cultural Heritages in Okinawa
Lastly, regarding the use and management of underwater cultural heritages in the
Yaeyama Islands or Okinawa Archipelago, we strongly consider there is great potential
for cultural resource management of underwater cultural heritage in the Yaeyama or
Okinawa. Since Okinawa Archipelago including the Yaeyama Islands locate in subtropic climatic zone with developed coral reefs in Japan, these islands, particularly the
Yaeyama, located in the southern part of Okinawa, are the most popular diving area in
Japan. Because of such environmental and social backgrounds, there is great potential
for the use and management of underwater cultural heritages including Yarabuoki site
as cultural, educational and tourism resources that the local community can properly
manage and conserve (see also Ono et al., 2013). Our interdisciplinary underwater
10

�research and current surveys reported here can be considered as the first stage for this
initiative of use and management of underwater cultural heritages in the Yaeyama and
Okinawa in the near future. This work is important as an initial stage because it is
essential to identify underwater archaeological or historical sites put forward the
significance of cultural heritage in order to manage them. For the second stage, we
should report and spread research outcomes to the public, particularly to the local
community. Concerning this stage, we have also tried to report our research outcomes
and information to the local schools, the museum and public offices after our first survey.
With such outreach activities, the local museum (Ishigaki City Yaeyama Museum) held a
special exhibition focusing on the underwater cultural heritage of the Yaeyama Islands,
including Yarabuoki site and exhibited many of our research outcomes. The robot
designed and tested by Sakagami during the surveys of 2013 was also exhibited.
For the third stage, we consider the significance of operating educational and cultural
programs to tell the historical or archaeological significance and future potentials of
underwater cultural heritage to the local young generations (school students). With such
reason, we also tried to operate the educational program for school students (mainly
Junior high school and High school students) to make small-sized low-cost underwater
robots to investigate shallow underwater in near shore coral reef zone in Ishigaki Island.
As the robot could be one of the key tools to attract the student’s interest, trigger their
curiosity and increase interest on underwater and underwater cultural heritage,
Sakagami has leaded the program since 2012. In November 2013, we also conducted
co-research in Yarabuoki site with some local high school students who had joined the
robot making program. During this co-research program, the diving team members
conducted their research of some anchors and pottery jars in the site, while Sakagami
supervised the students on how to manage and operate the human-portable underwater
robot for the observation of the underwater cultural heritage and underwater survey
activity. Following such educational practices, we also held some town meetings in
Ishigaki city to invite the school teachers, students, and local members of Educational
board to openly discuss about the possibility of the underwater cultural heritages around
Ishigaki Island and its potential use for further educational and cultural program. All of
these trials and practices seem to have worked to get the local community involved and
11

�to increase their interests in our research and underwater cultural heritage as well. Now,
our next target is to create the local society and its core members who want to join and
continue to conserve their underwater cultural heritages as educational, cultural and
tourism resources. As also mentioned by other Japanese scholars (e.g. Iwabuchi, 2012;
Katagiri et al., 2010, Katagiri et al., in this volume), the concept of establishing Seabed
Site Museums can be one of the ideal ways to accomplish our final goal for the use and
management of underwater cultural heritage in the Yaeyama and Ryukyu Archipelago in
the near future.

Table 1 GPS Position Coordinate and Depth of Anchors and Ceramics. (R. Ono)

Acknowledgements
We would like to acknowledge Mr. Seiji Fujii, Mr. Yuji Yamamoto, Mr. Toshiaki
Hayashibara, Dr. Shiro Takemura, Mz. Yumiko Ogawa, Mr. Naoshi Inabatani, and Mr.
Takehiro Furuse for their considerable support and assistance of our research in the
Yaeyama Islands. The underwater research of the Yarabeoki site was funded by The
Research Institute of Humanity and Nature, Japan. All the underwater pictures here
were taken and provided by Mr. Yuji Yamamoto. Lastly, we are greatly indebted to Dr.
Akihumi Iwabuchi and Dr. Tatsuya Nakata for their kind support and useful comments to
our first draft as the session organizers.

12

�References
Iwabuchi, A., 2012. The Sea Possessing Cultural Heritage. Kagaku-dojin, Kyoto (in
Japanese).
Kagoshima University, The Faculty of Law, Economics and Humanities and Association
for Nansei Islands Underwater Cultural Heritage Studies, 2010. The report 1: A research
report of the underwater cultural heritages in Nansei Islands in 2009. The Journal of
Underwater Archaeological Studies, No. 3: 5-31 (in Japanese).
Kagoshima University, The Faculty of Law, Economics and Humanities and Association
for Nansei Islands Underwater Cultural Heritage Studies, 2011. The report 4: A research
report of the underwater cultural heritages in Nansei Islands in 2010. The Journal of
Underwater Archaeological Studies, No. 4: 36-59 (in Japanese).
Katagiri,

C.,

(Ed.),

2007.Enganchiikiisekibunpuchousagaihou

(I)

–

Okinawa

hontooyobishuhenrito hen. Okinawa Prefectural Archaeological Centre, Naha (in
Japanese).
Katagiri, C., (Ed.), 2009. Enganchiikiisekibunpuchousagaihou (II) – Miyako Yaeyama
hen. Okinawa Prefectural Archaeological Centre, Naha. (in Japanese).
Katagiri, C., (Ed.), 2010. Enganchiikiisekibunpuchousagaihou (III) – gaiyoisekichizu hen.
Okinawa Prefectural Archaeological Centre, Naha (in Japanese).
Katagiri, C., 2011. Iron Anchors discovered in Nansei Islands. In The Faculty of Law,
Economics and Humanities and Association for Nansei Islands Underwater Cultural
Heritage Studies (Ed.), The Database of Underwater Cultural Heritage and Promotion of
Underwater Archaeology: Nansei Islands. The Asian Research Institute of Underwater
Archaeology, Fukuoka, 136-141 (in Japanese).
Katagiri, C., Yamada, H., Sakihara, T., Nakajima, T., Miyagi, H., and Watanabe, Y., 2012.
The Report of an Underwater Cultural Heritage Tour in Kumejima –The Project of ‘The
Museum of Underwater Cultural Heritage’. Bulletin of the Museum, Okinawa Prefectural
Museum and Art Museum, No. 5: 19-36 (in Japanese).
Kojima, R., 2012, Areal Characters of Japanese Style Ships during the Early Modern
Times. In H. Okamoto (Ed.), Difference and Similarity of Ship Culture in Eastern Asia:
Perspectives from the Early Modern Ryukyu and Comparative Study, Kansai University,
Osaka: 103-121 (in Japanese).
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�Miyagi, H., Katagiri, C., Higa, N., and Sakihara, T., 2005. Preliminary Investigation into
Discovering Sunken Ships in the Southwest Islands (II): Underwater Artifacts and
marine Transportation. Bulletin of the Archaeological Study of Okinawa, No. 2: 81-108
(in Japanese).
Ono, R., Katagiri, C., Sakagami, N., Kan, H., Miyagi, H. and Yamamoto, Y., 2013.
Present and Future of the Underwater Cultural Heritages in the Yaeyama Islands:
Perspective from the Recent Research of Yarabuoki. Proceedings of Yaeyama Museum,
Vol. 22: 20-43 (in Japanese).
Oohama, E., 1999.The Archaeology in the Yaeyama Islands. The Yaeyama Prehistoric
Culture and Research Institution, Ishigaki (in Japanese).
Biography
Rintaro Ono is an Associate Professor in the School of Marine Science and
Technologies at Tokai University, Japan. He has conducted numbers of archaeological
fieldworks in Island Southeast Asia, the Pacific islands, and Okinawa. The primary focus
of his research is development of the human’s maritime adaptation, maritime networking
and resource exploitation in island ecosystem.
Hironobu Kan is a Professor in the Graduate School of Education / Graduate School of
Natural Sciences, Okayama University, Japan. The primary focus of his current
research is Coral Reef Geomorphology using Multibeam Bathymetric Echo Sounder
and SCUBA Diving Surveys.
Norimitsu Sakagami is an Associate Professor in the School of Marine Science and
Technologies at Tokai University, Japan. The primary focuses of his research are
motion control of surface vehicles, underwater vehicles, environmental monitoring
systems, and linear control systems etc.
Masayuki Nagao is a Senior Researcher in the Institute of Geology and
Geoinformationat, The National Institute of Advanced Industrial Science and
Technology (AIST), Japan. The primary focus of his current research is Coral Reef
Geomorphology using Multibeam Bathymetric Echo Sounder and SCUBA Diving
Surveys.
Chiaki Katagiri is the chief curator of the Okinawa Prefectural Museum and Art
Museum. He has been actively engaged in investigation and research of underwater
cultural heritage in Ryukyu Archipelago. His papers include Research Studies of
Ginama Foreign Shipwreck sites in Kunigamison, Okinawa (2012).

14

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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                  <text>Dr. Akifumi Iwabuchi</text>
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                <text>First Discovery and Mapping of Early Modern Grapnel Anchors in Ishigaki Island and Cultural Resource Management of Underwater Cultural Heritage in Okinawa</text>
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                <text>Yarabuoki site, which contains iron grapnel anchors and early modern Okinawa ceramic jars in 12 to 32 m depth off the western Coast of Ishigaki Island, was discovered by a local diver and reported to Okinawa Prefectural Archaeological Center.  In 2010, the Center conducted a distributional survey to confirm the site and its location. Although the survey found and pictured seven numbers of grapnel anchors that were first findings of this type in Okinawa area, the previous study did not record each position and the accurate depth of these artifacts and the site character such as shipwreck site or discarded shipping loads site is yet unclear.  With such background and tasks, our team has conducted underwater archaeological research to record each location of grapnel anchors and ceramic jars using GPS. Furthermore, Kan and Nagao conducted a broadband multibeam survey around the Yarabuoki site and visualized the bathymetric &#13;
2  &#13;
results at a lateral grid resolution of 1m. This will enable us to create a three- dimensional site map to plot the artifacts, while Sakagami (Tokai University) developed a low-cost and human-portable underwater robot to explore and record high resolution video of underwater sites, and the robot successfully worked during our surveys. Our paper reports the results and outcomes of the research at Yarabuoki site and other underwater sites in Ishigaki and the Yaeyama Islands and discusses the early modern marine transportations in Okinawa or the Ryukyu Islands.  We also discuss the future possibility for cultural resource management of underwater cultural heritages in the Yaeyama and Okinawa.</text>
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                <text>Rintaro Ono</text>
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                <text>Hironobu Kan</text>
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                <text>Norimitsu Sakagami </text>
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                <text>Masayuki Nagao</text>
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                <text>Chiaki Katagiri, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.) </text>
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                <text>5/15/2014</text>
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                    <text>The History, Status, and Future of Underwater Cultural Heritage Management in
Japan
Randall J. Sasaki
Texas A&amp;M University
College Station 77841
USA
Email: shipwreckarchaeology@gmail.com
Setsuo Imazu, Yuji Dainobu, and Yoshihiko Akashi
Kyushu National Museum
Fukuoka
Japan, 818-0118
Email: imazu@kyuhaku.jp
Email: dainobu@kyuhaku.jp
Email: akashi@kyuhaku.jp
Abstract
Underwater archaeology in Japan has a long history, as a report of artifacts from Lake
Suwa in 1908, as well as discoveries at Tsuzura Ozaki site in Lake Biwa in 1924
detailed. The attempts to find the ill-fated fleet of Khubilai Khan at Takashima Island in
Nagasaki prefecture began in the 1980s, but the Japanese archaeological community
was slow in recognizing the importance of underwater archaeology. A number of
underwater archaeological projects were conducted, but none had a lasting influence;
the Japanese government has no law that specifically protects submerged sites, and
there was neither government agency nor university that conducted a large scaled
underwater excavation. However, several major developments suddenly took place in
the past few years. In 2012, at first, following the discovery of a Chinese ship remain at
Takashima Island, the Kozaki Underwater Site was registered as the first submerged
national historic site. In 2013, secondly, the Asian Research Institute of Underwater
Archaeology published 6 volumes of “The Database of Underwater Cultural Heritage
and Promotion of Underwater Archaeology: Report on Comprehensive Survey of
Maritime Cultural Heritage”. In 2013, moreover, the Agency for Cultural Affairs formed a
committee to discuss how the government should act in response to the growing
importance of protecting submerged sites. These events signify the Japanese
archaeological community, as well as the government, finally began to recognize the
importance of underwater cultural heritage. This paper illustrates the history, current
status, as well as the possible future development plan of underwater archaeological
research in Japan.
Keywords: The Japanese Agency for Cultural Affairs, Law and Policy, Mongol Invasion,
UCH Management, Database

1

�Introduction
As an island nation, the ocean has always influenced the life of people living in Japan.
A part of Japanese culture has been also shaped by “foreign” influences which must
come from “outside the ocean.” Despite these facts, Japan is one nation that has not
fully embraced the concept of underwater cultural heritage (UCH) management yet. In
this brief article, the authors will propose a possible plan for initiating the management
of submerged sites in the nation. To better understand this plan, a brief history of the
field, recent developments of underwater archaeology, and the status of Japanese
archaeological community are discussed.
A brief history of Underwater Archaeology in Japan
Japan possesses a long history of study of cultural relics found underwater. The
discoveries of lithic from Lake Suwa in 1908, and the discovery of nearly complete
pottery from Tsuzura Ozaki site at Lake Biwa in 1924 may be noted as the insipient
stage of the field of underwater archaeology (Ishihara, 2000). The archaeological
community debated how and why these underwater sites formed. It is interesting to note
that archaeologists from a century ago had recognized the importance of submerged
cultural remains. Since, a number of sites were investigated through a local municipal
level but the majority of the projects were limited in scale (Hayashida, 2013). However,
two projects that played an important role in the development of underwater
archaeology in the country should be mentioned; sites around Lake Biwa and
Takashima underwater site.
The largest inland lake in Japan, Lake Biwa has been an important waterways as well
as a source of water and food for the people of central Japan. Since the lakefront
renovation plan was commenced in 1972, Lake Biwa became one of the focal points of
UCH management in the country; over one hundred sites were investigated through this
development project (Shiga Prefectural Association for Cultural Heritage, 2010).
Cofferdams were built on nearly all of these sites making a dry land excavation possible
(Shiga Prefectural Association for Cultural Heritage, 2010). The sites range from Jomonmidden sites to historic building structures; information gleaned through these
excavations was tremendous. One important site, dated to around 4,500 years before
present, is the Awazu-midden site (Tsuboi, 1994). The shell midden consisted of a layer
2

�of shells and a layer of plants alternatively bedded (Matsui and Kanehara, 2006). Such
layering seen at the Awazu site has not been found on any midden sites on land; this is
due to a waterlogged condition favorable for the preservation of the organic remains.
Chestnuts, acorns, beans, gourds, edible burdock, and other cultigens were found
within the plant layers and these plants were most likely cultivated, making the Awazu
site one of the earliest that produced an evidence of extensive plant utilization in the
country (Matsui and Kanehara, 2006). Japan with its acidic soil, large fluctuation of
temperature, and a high annual rainfall rate, finding organic remains on a land site is
rare. Thus, the potential of finding evidence of rich and extensive plant utilization of the
early inhabitants of Japan is more likely to be found from underwater sites. The
Takashima underwater site is a well-known historical battle site; Khubilai Khan’s fleet
was destroyed here by the legendary typhoon during the Mongol invasion of Japan in
1281 (Delgado, 2010). The site has been reported by popular media, but has seen only
a few scholarly publications (Takano, 2013). The history of research at Takashima
extends for more than 30 years; based on historical records and local fishermen finding
artifacts in their nets, the initial survey around the island was planned in the early 1980s.
The project was led by a marine engineer, and various artifacts were found using a
sonar system. Some of the artifacts were raised by divers; however, no remains of a
vessel were found.

Although professional archaeologists were not directly involved

during this initial stage, the importance of the site was recognized (Matsuura City Board
of Education, 2011). The Takashima underwater site was registered as a known
archaeological site and thus became a protected archaeological site by the Law of
Buried Cultural Property. Under this law, a site must be thoroughly investigated prior to
any land development taking place.
Following this initial project, a series of surveys and excavations were conducted at the
island intermittently throughout the 1980s and 1990s. The board of Education at
Takashima entrusted the research projects to various organizations, and the Kyushu
Okinawa Society of Underwater Archaeology (now the Asian Research Institute of
Underwater Archaeology: ARIUA) became the main partner of research. The rescue
excavations for the harbor renovation at Kouzaki produced a large number of artifacts
related to the Mongol invasion. The excavations continued, and large wooden anchors,
3

�fragments of hull remains, and weapons including ceramic bombs are just a few
examples of finds made (Fig. 1). However, the discovery of a hull had to wait for a few
more years (Matsuura City Board of Education, 2011).
As will be discussed in detail
below, the overall majority of
archaeological projects in the
nation are conducted through
local municipalities. While the
discoveries were being made,
a few underwater excavations
had taken place across Japan,
but some projects had barely
Fig. 1 Photo of the Hull Timbers waiting to be conserved at been reported. The Japanese
Takashima. (Courtesy of Matsuura Board of Education and R. Agency for Cultural Affairs
Sasaki)

(JACA)

had

realized

the

importance of underwater archaeology and a national plan to manage such sites.
Between 1989 and 1991, JACA sent interviews to all 3,245 municipal offices in the
country, and a large number of offices reported the possible presence of submerged
sites or artifacts recovered from their waters. Among them, 216 locations were selected
for an additional survey. The result showed that only 44 of these sites were investigated
(Agency for Cultural Affairs, 2000).
Recent Developments
A new phase of research at Takashima was initiated by the team led by Ryukyu
University and the technical support provided by the Tokai University. Several seasons
of remote sensing surveys identified several targets. In 2011 when divers began
removing the accumulated silt on one of the targets, the remains of a Chinese vessel,
perhaps more than 20 m in length, appeared. This discovery was covered extensively
by Japanese media and brought underwater archaeology to the forefront of attention for
many people (Ikeda, 2013). In 2012, Takashima became the first nationally registered
submerged historical site; it signifies that an underwater site is now protected as one of
the most important Japanese national heritage assets (Nakata, 2013). Following the
4

�discovery of intact hull remains at
Takashima,

JACA

formed

a

committee to discuss how the
Japanese government should act
to protect submerged sites. The
members
various

were

selected

specialists

from

including

municipal officials, a vocational
archaeologist, and a conservator.
At

this

point,

no

specific

Fig. 2 ARIUA’s Webpage Showing a Part of the Database. (K. management plan for the country
Hayashida)
has been decided. To provide the

committee with up to date and accurate information regarding the status of managing
submerged sites, Kyushu National Museum was entrusted to study how other countries
in the world are managing their UCH.
Another development that took place in recent years is the growth in number of
academic, municipal, and vocational maritime archaeologists. Recognizing the growing
importance of the field, Tokyo University of Marine Science and Technology became the
first University in Japan to establish a course in maritime archaeology. The University
initiated a number of survey projects using advanced remote-sensing technologies
(Kondo and Iwabuchi, 2011). Some municipalities, including Okinawa, has developed a
strong team of archaeologists that can manage the UCH in their waters. They have
also conducted several outreach programs where a public can access the underwater
sites (Katagiri, 2013). In the last decade, several underwater archaeology groups were
formed and conducted research at submerged sites. Among them, ARIUA emerged as a
leading institute.

Besides their work at Takashima, the ARIUA’s underwater site

database project initiated in 2009 should be equally cited as a breakthrough. They
conducted an extensive evaluation of all known underwater sites in Japan. The project
was also supported by various organizations, including other vocational underwater
archaeological groups. This was the first time that such a comprehensive information of
submerged sites was collected.

ARIUA published six volumes of reports with a
5

�Table 1. Examples of part of the Database available on-line (translated into English)

6

�database of over five hundred submerged sites (Fig. 2 and Table 1) (Asian Research
Institute of Underwater Archaeology, 2013). This study will be a valuable source for
obtaining information regarding underwater archaeology in Japan and a foundation for
future studies on the subject.
Problems Concerning Underwater Cultural Heritage Management in Japan
There are three main problems concerning the protection of UCH in Japan. First, the
underwater sites are not specifically mentioned in the laws. Second, there are no proper
rules established when someone discovers a relic underwater, and third, no
archaeological survey is required prior to a construction over water. Another concern,
perhaps different in nature than the first three mentioned, is the lack of information
regarding UCH in general.

Before beginning the discussion of these problems, a

current status of Japanese archaeological community will be illustrated.
The law on the Protection of Buried Cultural Properties is the basis of all archaeological
excavations in Japan. JACA sets the rules and guidelines for site management, and in
most cases, the local Board of Education is responsible for managing local sites (The
Japanese Archaeological Association, 2012). Each municipality is responsible for
maintaining a database of known sites. Once the site is listed, any development that
takes place within or around the site must be excavated. The local authority decides
which sites are to be listed and some municipalities take a step further by surveying.
There are many Universities with programs in archaeology, but academic research
within Japan is little more than 5 % of the total (The Japanese Archaeological
Association, 2012). There are a few public archaeology firms, but they are mainly
limited to conducting projects in large cities. Their archaeological projects must also
follow the municipal standards. The number of archaeological sites excavated - around
8,000 sites per year - may be surprising to many (The Japanese Archaeological
Association, 2012). Although many of the sites are small, the number of artifacts
recovered from these sites accumulates quickly. For example, the number of sites (or
perhaps it should be called “projects”) at Hakata, the historical port city in Fukuoka
Prefecture in western Japan, now counts up to two hundred in number. These Hakata
sites produce thousands of artifacts each. Many of the municipalities are struggling to
complete the analysis of the astronomical amount of data gathered. Still, excavations
7

�take place each year while the budget and the number of specialists involved with the
heritage management has been shrinking (The Japanese Archaeological Association,
2012). In this situation, the focus of the research tends to be detailed artifact analysis
(which Japanese archaeologists are one of the best in the world) and starting something
new is extremely difficult.
Japanese law also has a room for improvements. Although the current law does not
specifically mention artifacts found underwater, the absence of the word “underwater” in
the legal code should not imply that submerged sites need not be protected.
Underwater sites can be protected if they are registered; the problem is how to get the
site onto the list. The Takashima underwater site has been on the protected list and thus
the past rescue projects were possible. Still, not having the word “underwater” may give
an impression - consciously or not - that such sites are not common. The second
problem, not having a set of standards when discovering an underwater site, may be a
larger issue than the first problem. When a relic is found, a person should report to the
local police department first. The police will then decide the fate of the found artifact.
There are several ways to dispose of the finds depending on which law is applied. The
best way in which to protect objects is to define them as a cultural property. In this case,
the object will have the same protection as that found on land. If the police consider the
artifact as a lost object, the law of lost property will be applied; the lost object may be
given to the finder if no one claims ownership of it. The third problem is not having a
regulation that requires archaeological survey before a development takes place over
water. The archaeological community is largely unaware that such a survey does not
require a large sum of money as it did in the past, and the industry is unaware of the
fact that underwater sites are fairly common.
One problem is the lack of information on maritime archaeology that can be found
written in Japanese. In addition, a somewhat skewed and out-dated image of the field
still persists. The blame should not be directed towards Japanese archaeologists, as it
is our shared world heritage that we are striving to preserve. Not many people in Japan
think that underwater sites are common and finding those sites are extremely difficult
and expensive, if not impossible.

Many think that to become an underwater

archaeologist requires extensive training, and that excavations and conservation still
8

�more expensive.

The information we hear about the subject primarily comes from

national projects conducted in China and Korea, together with the stories of raising
Vasa and Mary Rose. Considering the national budget set for archaeological research,
underwater archaeology does not appear to be a practical choice. Furthermore, since it
is certain that there is no job that a student can get even with a degree in hand, the
study of underwater archaeology cannot be a career of choice for many.
Proposed Plan
There are several ways in which Japan may develop the program managing UCH. One
possible way is for Japan to create a national underwater archaeological research
center under JACA. This plan may be similar to the path China and Korea have taken.
However, considering that the Japanese archaeological community is structured
through cooperation of municipal archaeologists and a nation-wide project is rare, this
plan may result in the isolation of underwater archaeologists from the rest of the “land
archaeologists.” In addition, the government must first secure funding for such program.
The most suitable plan for Japan is to utilize the existing infrastructure, limit any major
changes, and create a system that municipal archaeologists could manage. The best
management plan is one in which the main task of actual activities will be conducted
through the municipal archaeologists and the existing groups of underwater
archaeologists assisting the tasks. JACA will provide advice to municipalities and check
the overall management of the underwater sites. The municipal archaeologists will
manage the underwater sites according to the principles set by JACA. The main task
will be to register new sites and perhaps organize surveys and excavations with the
help of vocational underwater archaeological groups. As this scheme is only a proposal
and not a completed plan, the details regarding how to incorporate the nonarchaeological community and stakeholders into the overall heritage management has
not been fully debated.
Along with the minor organizational arrangements, changes must be made in some of
the laws; the three problems mentioned in the section above must be solved. The
current cultural heritage law is an effective way to protect underwater sites, even it does
not mention the word “underwater” specifically.

JACA may distribute to each

municipality an addendum explaining the guidelines for managing UCH. It should be
9

�mentioned in these guidelines that objects found in submerged context should have
equal protection to those found on land. In addition, a survey to find and record new
archaeological sites should be encouraged. The government should set a standard
procedure when someone finds a historical artifact underwater, and a note should be
distributed to all authorities. A change in legislation - namely to require a survey before
development takes place on water and an agreeable cooperation plan with the
fishermen’s association - is needed. When there is construction over water, conducting
archaeological surveys by marine engineering companies is not something out of the
ordinary. Once the stake-holders realize the importance of protecting underwater sites,
as they respect archaeological sites on land, installing a rule for surveys on water
should not be difficult to accept. The actual “loss” for a community and the stake-holders
caused by adopting the protection of UCH, we believe, is minimal; the benefit, although
it may be difficult to represent in economical terms, should outweigh the malefic. The
local community may feel pride in having an underwater site, or some of the
representative artifacts raised from the sea may bring tourists to the area.
At the same time these changes are made, more up to date and accurate information
about maritime archaeology should be disseminated. Both academic and non-academic
publications should be encouraged. There is a plethora of reasons why distributing a
current status of the study need to be promoted. To give one example, the Japanese
archaeological community has already realized that raising and conserving a nearly
complete vessel is not practical; however, it is a surprise to the Japanese public, as well
as archaeologists, that the study of underwater archaeology is no longer about
excavating sunken vessels. Once the archaeological community realizes that a project
that raises an entire vessel is not a norm, and the coexistence of development with a
long-term management of underwater sites is the current trend, a meaningful discussion
of how the nation should protect submerged sites can begin. In addition to academic
publications, the study of UCH should be introduced to a wider audience through
popular publications and media. The stakeholders, including construction companies
and the fisheries cooperatives, are the most likely groups that will be directly involved
with UCH. Without the proper understanding of the value of artifacts found underwater
by these groups, a protection of UCH will be difficult to achieve.
10

�Conclusions
In this brief article, the history and current status of UCH in Japan was discussed.
Based on the discussion, a possible plan on UCH management was proposed. Despite
a long history of people being interested in relics found underwater, the Japanese
archaeological community was largely indifferent to the development of UCH
management around the globe. To bring about change in the Japanese archaeological
community may take some effort, but the benefit of the proposed approach is that it
does not require an extensive change in how the archaeological community is
organized, nor does it requires a large budget. It also preserves the existing, and
growing, underwater archaeological groups in the nation. Although this is one proposed
solution, we believe it will bring more in depth and meaningful discussion on how to
manage UCH in Japan.
Acknowledgment
This paper was written by the members of a group led by Kyushu National Museum
entrusted to create a report for the Japanese Agency for Cultural Affairs on a current
trend of UCH management in the world. This is only a proposal generated by the
authors’ personal views and does not reflect the opinion or the plan of the Japanese
government nor any institutions.
References
Agency for Cultural Affairs., 2000. Considering Methods for the Protection of
Archaeological Sites: Underwater Sites. Agency for Cultural Affairs, Tokyo (in Japanese).
Asian Research Institute of Underwater Archaeology., 2013. The Database of
Underwater Cultural Heritage and Promotion of Underwater Archaeology (Vol. 1-6).
Asian Research Institute of Underwater Archaeology, Fukuoka (in Japanese).
Delgado, J., 2010. Khubilai Khan’s Lost Fleet: In Search of a Legendary Armada.
University of California Press, Berkeley.
Hayashida, K., 2013. Underwater Archaeological Sites in Japan. Archaeology Quarterly,
Vol. 123: 20-23 (in Japanese).
Ikeda, Y., 2013. The Excavations of the Shipwreck in the Mongolian Invasions; the
Underwater Archaeological Research of the Takashima Kouzaki Seabed Site. The
Archaeological Journal, Vol. 641: 24-28 (in Japanese).
11

�Ishihara, W., 2000. The History of Underwater Archaeology in Japan. In Agency for
Cultural Affairs (Ed.), Considering Methods for the Protection of Archaeological Site:
Underwater Sites, Agency for Cultural Affairs. Tokyo: 5-22 (in Japanese).
Japanese Archaeological Association. 2012. Archaeologia Japonica Vol. 64: Annual
Report of the Japanese Archaeological Studies and Excavations (Fiscal year 2011). The
Japanese Archaeological Association, Tokyo (in Japanese).
Katagiri, C., 2013. The Research Agenda and Vision for Future. In The Database of
Underwater Cultural Heritage and Promotion of Underwater Archaeology: Nansei
Islands. Asian Research Institute of Underwater Archaeology, Fukuoka: 216-237 (in
Japanese).
Kondo, H., and Iwabuchi, A., 2011. Deepwater Archaeology off Tobishima Island of
Northern Japan. In Mark Staniforth, Jennifer Craig, Sheldon Clyde Jago-on, Bobby
Orillaneda, Ligaya Lacsina (Eds.), Asia-Pacific Regional Conference on Underwater
Cultural Heritage Proceedings, Manila: 251-259.
Matsui, A., and Kanehara, M., 2006. The Question of Prehistoric Plant Husbandry
during the Jomon Period in Japan. World Archaeology, Vol. 38 (2): 259-73 (in
Japanese).
Matsuura City Board of Education., 2011. Matsuura City Takashima Underwater Site:
Summary of Research (Matsuura City Cultural Property Investigation Report), No. 4.
Matsuura City Board of Education, Matsuura, Nagaski (in Japanese).
Nakata, A., 2013. Historical Site Designated by the Site “The Takashima Kouzaki Ruins.”
The Archaeological Journal, Vol. 641: 8-13 (in Japanese).
Shiga Prefectural Association for Cultural Heritage., 2010. World of Underwater
Archaeology at Lake Biwa. Sunrise Publishing, Hikone, Shiga (in Japanese).
Takano, S., 2013. Takashima Island (The Research Results of Japanese Underwater
Archaeology). Archaeology Quarterly, Vol. 123: 34-36 (in Japanese).
Tsuboi, K., 1994. The Lake of Jomon: Discussions on the Awazu Shell Midden of Lake
Biwa. Yuzankaku, Tokyo (in Japanese).

12

�Biography
Randall J. Sasaki a PhD candidate at Texas A&amp;M University, Sasaki is also working as
a city archaeologist in Fukuoka City. His main interest has been traditional East Asian
shipbuilding technology, particularly from the Chinese Yuan (Mongol) dynasty period.
He conducted a timber recording project at the Takashima underwater site and also led
a survey team at the Bach Dang River Naval Battle Site in Vietnam. He has been
working on promoting importance of Underwater Cultural Heritage to the Japanese
public; a popular book he published became one of the best seller titles on the subject
in Japan.
Setsuo Imazu has received his doctorate from Aoyama Gakuin University. He has
worked at Fukushima Museum and Archaeological Institute of Kashihara at Nara. In
2005, he was invited to the newly created Kyushu National Museum. Currently he is the
Director of Museum Science Division. He specializes in conservation, mainly focusing
on treatment of waterlogged wood. He has published in various scholarly articles in
Japan and other countries.
Yuji Dainobu received his BA in History of Western Art from the International Christian
University in 1977, Maitrise in History of Western Art from Universite Catholique de
Louvain (Belgium) in 1980, and MA in History of Eastern Art from Kyushu University in
1983. He worked as a research assistant at the Faculty of Letters at Kyushu University
in 1983, and later as a curator at Tokyo National Museum until 2004. He has joined
Kyushu National Museum in 2004. He has organized many exhibitions including Tibetan
Art, Liao Art, HIRAYAMA Ikuo and World Cultural Heritage. He has published many
articles on Buddhist art and Silk Roads.
Yoshihiko Akashi studied archaeology at Meiji University. His career includes working
at Kyushu Historical Museum. His current position is the Director of Exhibition Division
at Kyushu National Museum. He has published a number of scholarly articles on
Japanese forts, or mountain castle, and also on the study of international commerce
and relationship in ancient Asia. He is also interested in ancient Korean ceramics and
decorated Kofun (painted tumuli).

13

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                  <text>Session 9: History and Current Trends of Underwater Archaeology around East Asia</text>
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                  <text>Interview with Session 9 chair Dr. Akifumi Iwabuchi and links to the papers presented in the session.</text>
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                  <text>East Asia is rich in maritime and underwater cultural heritage. Not only conventional shipwrecks or submerged archaeological sites but also stone tidal weirs or prehistoric shell mounds along coastal zones have extensively been identified by many researchers. Most countries have just started in directing the heritage management in order to preserve them well, but the process of trial and error is still going on. In addition, no Asian nation, except for Cambodia and Iran, has ratified the UNESCOâ€™s 2001 convention yet, partly because of territorial disputes over the sea among several East and Southeast Asian governments. It would be foolish to rule out political considerations when we study maritime or underwater archaeology in Asia.&#13;
This session showcases papers about the history and current trends of maritime or underwater archaeology around East Asia. It may includes papers focusing upon historical backgrounds or wakeup calls of underwater cultural studies, ongoing excavations, grass roots movements, legislation efforts, contemporary political matters, and so forth. In 1890 an Ottoman frigate sunk within Japanese territorial waters; her wreck has lately been salvaged by foreign hunters who disregard its domestic law for the protection of cultural properties, while Japanese academic institutions or underwater archaeological organizations have been kept away from the excavation activities. Papers on points raised from such case studies will also be welcomed. </text>
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                  <text>Dr. Akifumi Iwabuchi</text>
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                <text>The History, Status, and Future of Underwater Cultural Heritage Management in Japan </text>
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                <text>Underwater archaeology in Japan has a long history, as a report of artifacts from Lake Suwa in 1908, as well as discoveries at Tsuzura Ozaki site in Lake Biwa in 1924 detailed. The attempts to find the ill-fated fleet of Khubilai Khan at Takashima Island in Nagasaki prefecture began in the 1980s, but the Japanese archaeological community was slow in recognizing the importance of underwater archaeology. A number of underwater archaeological projects were conducted, but none had a lasting influence; the Japanese government has no law that specifically protects submerged sites, and there was neither government agency nor university that conducted a large scaled underwater excavation. However, several major developments suddenly took place in the past few years. In 2012, at first, following the discovery of a Chinese ship remain at Takashima Island, the Kozaki Underwater Site was registered as the first submerged national historic site. In 2013, secondly, the Asian Research Institute of Underwater Archaeology published 6 volumes of â€œThe Database of Underwater Cultural Heritage and Promotion of Underwater Archaeology: Report on Comprehensive Survey of Maritime Cultural Heritageâ€. In 2013, moreover, the Agency for Cultural Affairs formed a committee to discuss how the government should act in response to the growing importance of protecting submerged sites.  These events signify the Japanese archaeological community, as well as the government, finally began to recognize the importance of underwater cultural heritage.  This paper illustrates the history, current status, as well as the possible future development plan of underwater archaeological research in Japan.</text>
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                <text>Randall J. Sasaki</text>
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                <text>Setsuo Imazu</text>
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                <text>Yuji Dainobu</text>
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                <text>Yoshihiko Akashi, in Van Tilburg, H., Tripati, S., Walker Vadillo, V., Fahy, B., and Kimura, J. (eds.)</text>
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