Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1016/j.gloplacha.2018.12.014

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1016/j.palaeo.2018.10.033

Language：English   Publishing type：Research paper (scientific journal)  

The approximately 10,000-year-long Last Glacial Maximum, before the termination of the last ice age, was the coldest period in Earth’s recent climate history1. Relative to the Holocene epoch, atmospheric carbon dioxide was about 100 parts per million lower and tropical sea surface temperatures were about 3 to 5 degrees Celsius lower2,3. The Last Glacial Maximum began when global mean sea level (GMSL) abruptly dropped by about 40 metres around 31,000 years ago4 and was followed by about 10,000 years of rapid deglaciation into the Holocene1. The masses of the melting polar ice sheets and the change in ocean volume, and hence in GMSL, are primary constraints for climate models constructed to describe the transition between the Last Glacial Maximum and the Holocene, and future changes; but the rate, timing and magnitude of this transition remain uncertain. Here we show that sea level at the shelf edge of the Great Barrier Reef dropped by around 20 metres between 21,900 and 20,500 years ago, to −118 metres relative to the modern level. Our findings are based on recovered and radiometrically dated fossil corals and coralline algae assemblages, and represent relative sea level at the Great Barrier Reef, rather than GMSL. Subsequently, relative sea level rose at a rate of about 3.5 millimetres per year for around 4,000 years. The rise is consistent with the warming previously observed at 19,000 years ago1,5, but we now show that it occurred just after the 20-metre drop in relative sea level and the related increase in global ice volumes. The detailed structure of our record is robust because the Great Barrier Reef is remote from former ice sheets and tectonic activity. Relative sea level can be influenced by Earth’s response to regional changes in ice and water loadings and may differ greatly from GMSL. Consequently, we used glacio-isostatic models to derive GMSL, and find that the Last Glacial Maximum culminated 20,500 years ago in a GMSL low of about −125 to −130 metres.

DOI： https://doi.org/10.1038/s41586-018-0335-4

Language：English   Publishing type：Research paper (scientific journal)  

The USS Emmons, a 106m US Navy Gleaves‐class destroyer minesweeper that sank in 40m of water off Okinawa Island, Japan after kamikaze attack in 1945, is used as a case study for examining the history, multivocal significance, and heritage management of a World War II naval battle site. A baseline record of the site was made using an innovative method incorporating precise control points obtained from high‐resolution multibeam echosounding bathymetry to generate 3D models using structure‐from‐motion photogrammetry. The 3D models produced can be used for sharing information about this underwater cultural heritage and for future in situ monitoring of the archaeological remains.

DOI： 10.1111/1095-9270.12301

Language：English   Publishing type：Research paper (scientific journal)  

Previous drilling through submerged fossil coral reefs has greatly improved our understanding of the general pattern of sea-level change since the Last Glacial Maximum, however, how reefs responded to these changes remains uncertain. Here we document the evolution of the Great Barrier Reef (GBR), the world’s largest reef system, to major, abrupt environmental changes over the past 30 thousand years based on comprehensive sedimentological, biological and geochronological records from fossil reef cores. We show that reefs migrated seaward as sea level fell to its lowest level during the most recent glaciation (~20.5–20.7 thousand years ago (ka)), then landward as the shelf flooded and ocean temperatures increased during the subsequent deglacial period (~20–10 ka). Growth was interrupted by five reef-death events caused by subaerial exposure or sea-level rise outpacing reef growth. Around 10 ka, the reef drowned as the sea level continued to rise, flooding more of the shelf and causing a higher sediment flux. The GBR’s capacity for rapid lateral migration at rates of 0.2–1.5 m yr−1 (and the ability to recruit locally) suggest that, as an ecosystem, the GBR has been more resilient to past sea-level and temperature fluctuations than previously thought, but it has been highly sensitive to increased sediment input over centennial–millennial timescales.

DOI： https://doi.org/10.1038/s41561-018-0127-3

Other Link： https://www.nature.com/articles/s41561-018-0127-3

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1016/j.quaint.2017.09.032

Language：English   Publishing type：Research paper (scientific journal)  

The Yarabuoki underwater site contains seven iron grapnel anchors and Early Modern Okinawan ceramic jars and is dated to the 16th–19th centuries. The site lies at a depth of 12–32 m off the western coast of Ishigaki Island in Okinawa, Japan. Based on underwater archaeological and broadband multibeam surveys, as well as historical research of the artefacts and Early Modern Ryukyuan shipping, we discuss the possible anchor and vessel types in Ryukyu and Eastern Asia in EarlyModern times.We also discuss the efficacy of low-costROV for assisting surveys in shallow-water environments and the value of educational programmes for promoting the management and conservation of underwater cultural heritage.

DOI： 10.1111/1095-9270.12145

Language：English   Publishing type：Research paper (scientific journal)  

The spatial distribution of modern coral reefs in the Northwest Pacific (NWP) is restricted to approximately 30°N. Understanding the high-latitude reef-growth process and its correlation to climate change may provide important insights into future reef growth at even higher latitudes in response to globalwarming.We conducted field surveys and obtained seven cores from the raised reefs of Kodakara Island (29°N, 129°E) in the NWP to determine the changes in and response of reef growth dynamics to millennial-scale climate change through the Holocene. To reconstruct the timing of the reef growth, 37 coral ageswere determined using acceleratormass spectrometry (AMS) radiocarbon dating.
The island is characterized by three Holocene reef terraces (Terraces I to III), which were uplifted ca. 2.4 ka, 1.0–0.4 ka, and in the modern era. Three growth hiatuses occurred circa 5.9–5.8 ka, 4.4–4.0 ka, and 3.3–3.2 ka, which correlate with millennial-scale climate changes (Hamanaka et al., 2012). The reef growth began at least 8 ka. Relatively rapid vertical growth of 3.6–3.3 m kyr−1 occurred between 8 and 6 ka. The reef started growing near land and then gradually extended seaward. The reef growth around the reef slope decelerated after 6 ka
and most likely coincided with the first and second hiatuses detected landward. In contrast with the reef flat, which resumed its growth after the third hiatus event, the reef mound accretion on the slope ceased definitively. Terrace I was uplifted ca. 2.4 ka. The reef growth reactivated ca. 1.3 ka, and the reef grewat a rate of 9.1m kyr−1 between 1.3 and 1.0 ka; this rate is the fastest growth recorded in this study. This time interval corresponds to the Medieval Climatic Anomaly (MCA). The cause of the delayed reef growth between 2.4 and 1.4 ka remains unclear, but itmay imply the existence of a late Holocene hiatus due to a weaker Kuroshio Current (KC) ca. 1.7 ka and to strong El Niño-Southern Oscillation (ENSO) activity between 2 and 1.5 ka in the East Pacific. The timing of the hiatuses agrees with theweakening of the KC and themore frequent El Niño events during the positive phase of the Pacific Decadal Oscillation (PDO), whereas the rapid growth coincides with La Niña conditions, such as the MCA, during the negative phase of the PDO. Our results indicate that the climate event at approximately 4 ka caused the largest change in the reef growth, and it may have affected reefs throughout the Pacific region. Specifically, the ENSO and PDO phases may have impacted the reef growth and KC behavior.

DOI： 10.1016/j.geomorph.2015.04.011

Language：English   Publishing type：Research paper (scientific journal)  

Submerged tropical karst features were discovered in Nagura Bay on Ishigaki Island in the southern Ryukyu Islands, Japan. The coastal seafloor at depths shallower than ~130 m has been subjected to repeated and alternating subaerial erosion and sedimentation during periods of Quaternary sea-level lowstands. We conducted a broadband multibeam survey in the central area of Nagura Bay (1.85 × 2.7 km) and visualized the high-resolution bathymetric results over a depth range of 1.6–58.5 m. Various types of humid tropical karst landforms were found to coexist within the bay, including fluviokarst, doline karst, cockpit karst, polygonal karst, uvalas, and mega-dolines. Although these submerged karst landforms are covered by thick postglacial reef and reef sediments, their shapes and sizes are distinct from those associated with coral reef geomorphology. The submerged landscape of Nagura Bay likely formed during multiple glacial and interglacial periods. According to our bathymetric results and the aerial photographs of the coastal area, this submerged karst landscape appears to have developed throughout Nagura Bay (i.e., over an area of approximately 6 × 5 km) and represents the largest submerged karst in Japan.

DOI： DOI: 10.1016/j.geomorph.2014.07.032

Language：English   Publishing type：Research paper (scientific journal)  

To evaluate the relationships between coral calcification, thermal stress, and sedimentation and eutrophication linked to
human impact (hereafter referred to as ‘‘land development’’) by river discharge, we analyzed growth characteristics in the
context of a paleoenvironment that was reconstructed from geochemical signals in modern and fossil (1.2 cal kyr BP and
3.5 cal kyr BP, respectively) massive Porites corals from Nagura Bay (‘‘Nagura’’) and from modern Porites corals from the
estuary of the Todoroki River, Shiraho Reef (‘‘Todoroki’’). Both sites are on Ishigaki Island, Japan, and Nagura is located
approximately 12 km west of Todoroki. At Nagura, the individual corals provide time windows of 13 (modern), 10 (1.2 cal
kyr BP), and 38 yr in length (3.5 cal kyr BP). Here, we present the coral annual calcification for Nagura and Todoroki, and (bi)
monthly resolved records of Sr/Ca (a proxy of sea surface temperature (SST)) and Ba/Ca (a proxy of sedimentation and
nutrients related to land development) for Nagura. At Nagura, the winter SST was cooler by 2.8uC in the 1.2 cal kyr BP, and
the annual and winter SSTs in the 3.5 cal kyr BP were cooler by 2.6uC and 4.6uC, respectively. The annual periodicity of Ba/Ca
in modern coral is linked to river discharge and is associated with land development including sugar cane cultivation.
Modern coral calcification also has declined with SST warming and increasing Ba/Ca peaks in winter. However, calcification
of fossil corals does not appear to have been influenced by variations in Sr/Ca and Ba/Ca. Modern coral growth
characteristics at Nagura and Todoroki indicate that coral growth is both spatially and temporally influenced by river
discharge and land development. At Nagura, our findings suggest that land development induces negative thermal
sensitivity for calcification in winter due to sugar cane harvest, which is a specifically modern phenomenon.

DOI： 10.1371/journal.pone.0088790

Language：English   Publishing type：Research paper (scientific journal)  

Although coral calcification is directly related to coral health, few studies have examined the responses of
coral calcification to environmental stresses, with the exception of ocean acidification. In this study, we experimentally
exposed aposymbiotic (lacking symbionts) and symbiotic primary polyps of the scleractinian
coral Acropora digitifera to several seawater temperatures (27, 29, 31, and 33 °C) and salinities (26, 28, 30,
32, and 34) to investigate the effects of thermal and freshening stresses on coral calcification from the standpoint
of coral-algal symbiosis. Calcification rates were higher for symbiotic versus aposymbiotic polyps in
both sets of experiments, except for those reared at 31 °C and 33 °C. Calcification responses of symbiotic
polyps were a non-linear function of temperature, and the threshold temperature affecting skeletal growth
and bleaching was between 29 °C and 31 °C. Calcification rates of aposymbiotic polyps were also a nonlinear
function of temperature, with a maximum polyp weight at 31 °C, suggesting that thermal stress also
did some damage to the coral host itself. In contrast, skeletal growth of both aposymbiotic and symbiotic
polyps decreased linearly with increased salinity. Observations of the microstructure of polyp samples
revealed a clearly cyclic feature of skeletal surfaces that was likely related to organo-mineral deposition of
calcium carbonate even under lowered-salinity conditions. However, neither type of polyp reared at 33 °C
evidenced this characteristic, suggesting that thermal stress had compromised the normal calcification process,
which involves secretion of an organic matrix by the coral host. Our results suggest that the effects of
future global warming will include a reduction in coral calcification itself and the collapse of coral-algal symbiosis,
at least at the primary polyp stage. The present experiments showed that thermal stress would affect
the host's physiological functionality, whereas freshening stress, which is simply the dilution of ambient
seawater, would affect the mineralization process associated with coral calcification.

DOI： 10.1016/j.gloplacha.2012.05.001

Language：English   Publishing type：Research paper (scientific journal)  

The relative warmth and stability of the Holocene was punctuated by several brief cold events. Whereas these cold
events on a global scale are widely reported, the lack of records from regions such as the East China Sea (ECS) results in
an incomplete understanding of the underlying cooling mechanism.
Here, we present a coral-based paleo-SST (sea-surface temperature) reconstruction from the ECS to constrain Holocene
variability in the Kuroshio Western Boundary Current and the East Asian Monsoon (EAM). Our new data confirm that
cold conditions prevailed at 3.8 cal kyr BP, which is consistent with the previously-reported Pulleniatina Minimum Event
(PME). While this previous reconstruction could not reveal seasonal differences, our high-resolution data indicate a differing
seasonal SST response between summer and winter. This result provides an important insight into understanding
the mechanism of the millennium scale cold event in the ECS, the region affected by EAM.

Language：English   Publishing type：Research paper (scientific journal)  

Recent studies have reported Holocene millennial-scale climate instability at a global scale. However, the relationship
between this climate variability and coral reef growth is still unclear. Field observations and highprecision,
in situ coral radiocarbon dating of the excavated trench walls of an uplifted middle-to-late Holocene
coral reef on Kodakara Island, located in the pathway of the Kuroshio Current in the northwestern Pacific,
show evidence of the existence of disturbances with hiatuses in coral reef growth and coral composition differences
before and after the disturbances.We found three disconformities in the reef, and the dating results indicate
that disturbances with hiatuses in reef growth occurred at approximately 5.9 to 5.8, 4.4 to 4.0, and 3.3 to
3.2 cal yr B.P. The results also indicate that the second and third eventswere associatedwith sea-level oscillation.
The timing of the disturbances corresponds well with the periods when the Kuroshio Current was relatively
weak andwas associatedwith a relatively cold sea surface temperature,which may have enhanced the cold winter
Asian monsoons, and with Holocene North Atlantic ice-rafting cold events. The coral composition clearly
changed before and after the disturbances, with gradually reduced diversity resulting in a reef dominated by
acroporiid coral. These data led to the hypothesis that coral reef growth was interrupted by suborbital
millennial-scale global climate change induced by persistent solar activity during the Holocene in highlatitude
coral reefs, such as those in the Northwest Pacific, leading to low diversity in the reefs that experienced
each disturbance. Our results may provide new insights into theories of past and future coral reef formation
worldwide.

DOI： 10.1016/j.gloplacha.2011.10.004

Language：English   Publishing type：Research paper (scientific journal)  

This paper discusses the influence of the geological
setting of islands and reefs in the Maldives on the
impact of the 26 December 2004 Indian Ocean Tsunami.
Geological and geomorphological data (including orientation,
location, size, ellipticity, reef-island distance, proportion
of reef area to island area) were collected for
completely flooded and\25% flooded islands. The results
show that although the different parameters may interact to
reduce or magnify the impact, the reef-island distance is
the most important factor. The critical minimum distance
between the reef and the island shoreline required for the
wave to set up is estimated as 89 m on the eastern and
140 m on the western sides of the island, respectively.
Circular islands with short reef-island distance and small
percent of reef area seem to be safer in the context of
tsunami. The result of this study can be applied to identify
islands that are naturally protected/resilient against natural
disasters such as tsunami and those where the hazard is
greatest.

DOI： 10.1007/s10064-010-0278-y

Language：English   Publishing type：Research paper (scientific journal)  

The chronicles of the Ryukyu Kingdom describe at least four coastal inundation events at Ishigaki
Island during the seventeenth through nineteenth centuries: the 1771 Meiwa earthquake tsunami, which
killed 12,000 people; another earthquake tsunami (1687); and two events with unrecorded causes (1625
and 1714). We used a high‐resolution U/Th method to date well‐preserved surface parts of massive Porites
spp. coral head boulders that had been cast ashore and found that the ages of two boulders correspond to
the 1771 event. One large Porites boulder (diameter > 4 m) was dated to 1625, suggesting that that event
was also a large inundation event. Calibrated 14C ages, based on a newly estimated local value for the
radiocarbon marine reservoir effect, clustered around 1625 and 1771, suggesting that these events were
larger than the others. Our study demonstrated that Porites boulders have enormous potential value for
studies of paleoinundation events such as tsunamis and extreme storms.

DOI： 10.1029/2009GC002893

Language：English   Publishing type：Research paper (scientific journal)  

The Meiwa Tsunami, one of the largest tsunamis recorded in historical documents in Japan struck Ishigaki Island and neighboring
islands of the Ryukyu Arc in April 1771 AD, killing more than 12 000 people. An enormous number of massive Porites coral boulders are
scattered on the shore and in the reef moat of eastern Ishigaki Island. Although these boulders likely were cast ashore by the Meiwa
Tsunami, a detailed examination has not yet been conducted. When the marine reservoir effect is taken into account, one of mode values
of calibrated radiocarbon dates possibly corresponds to the time of the 1771 event. However, the range of calibrated radiocarbon ages
indicates that the transport of the boulders cannot be ascribed solely to the tsunami. Oxygen isotope microprofiling, which indicates seasurface
temperature variation, was therefore conducted to further investigate the mechanism of transport. The results suggest that the
skeletal growth of most coral colonies was interrupted in summer or autumn; hence, tropical storms and typhoons are also very likely to
be agents of transport. Thus, by combining radiocarbon dating with oxygen isotope microprofiling to investigate Porites coral boulders,
it is possible to separate paleotsunami boulders from those transported by storm events as far as tsunamis occurred during the non-storm
season.

DOI： 10.1016/j.quageo.2007.12.002

Language：English   Publishing type：Research paper (scientific journal)  

Following the tsunami caused by the Sumatra-Andaman earthquake of 26
December 2004, the Republic of Maldives reported 82 confirmed deaths, 26 people
missing and more than 3,997 incidents of house/building damage. Such an experience
suggests that all atoll nations/districts in the Pacific and Indian Oceans face a potential
risk of severe tsunami-induced damage, and an understanding of what occurred may help
us to form a basis for recognizing the safer areas of land on atoll islands.
To this end, we investigated 43 islands in the northern-to-southern Maldives by
measuring watermarks and profiles across the islands, and interviewing local residents to
determine the characteristics of the tsunami and evacuation procedures.
The movement and influence of the tsunami varied by atoll and island topography.
In the northern Maldives where the atoll rims consist of numerous faroes and are
interrupted by many channels, the tsunami entered the lagoons through these channels
and appeared to set-up the lagoon water level. The backwash of the lagoon water to the
open ocean caused inundation of the lagoon-side villages on islands at the eastern atoll
rim. Beach ridges developed on the eastern side of these islands acted as breakwaters
against the tsunami from the east. In contrast, catastrophic damage and high run-up levels
of 3.6 m above Mean Sea Level (MSL) at maximum water depth occurred on the eastern
islands in atolls with a continuous atoll rim in the southern Maldives. Damage on the
western atoll rims and in the lagoons was relatively small. The continuous eastern atoll
rim and its islands acted as a breakwater against the tsunami from the east. The eastern
islands in atolls in the central Maldives where the atoll rim is moderately interrupted by
channels were hit by both the direct surge from the east and floodwater from the lagoon.
Less damage was reported from the far southern atolls where major channels cut across
the atoll chain.
The movement of the tsunami in atolls thus differed according to the distribution
of the atolls in the archipelago and the continuity of atoll rims against the incoming
direction of the tsunami. The disaster status on individual islands also differed according
to the location of islands on atolls, height of islands, and development of beach ridges
and associated topographic zones.
It is generally understood that the Indian Ocean tsunami arrived without any
forerunning phenomena in areas located west of tsunami source area. However, according
to the results of our interviews in the southern Maldives, the following forerunning
phenomena were in fact observed: 1) loud noises (from 2-to-10 minutes before the
tsunami); 2) bubbling reef flat water (from 2-to-10 minutes before the tsunami); and 3)
the thrusting up of house floors or the bottoms of concrete wells (a few-to-10 seconds
before the maximum tsunami surge). Refuge taken in branched trees and in the lee of
strong walls was especially effective on low-lying atoll islands. Fishing boats (dhonis)
played an important role in the rescue of people swept into lagoons. It is hoped that the
collation of detailed information on the December 2004 tsunami events and disaster
measures taken in this report will contribute to a better understanding of the risks faced
by atoll nations, as well as to risk management development.

Language：English  

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Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1017/RDC.2023.122

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.oceaneng.2023.115632

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1029/2023JF007083

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： doi.org/10.3755/jcrs.22.7

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： doi.org/10.3755/jcrs.22.19

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1142/9789811204487_0089

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)  

Responsible for pages：p.222-235.   Language：Japanese   Book type：General book, introductory book for general audience

Responsible for pages：p.940-945.   Language：English   Book type：Scholarly book

Responsible for pages：479pp   Language：English   Book type：Scholarly book

Responsible for pages：p.59-84.   Language：Japanese   Book type：Scholarly book

Responsible for pages：p.79-85.   Language：Japanese   Book type：Scholarly book

Responsible for pages：p255-258.   Language：Japanese   Book type：General book, introductory book for general audience

Responsible for pages：p.90-91.   Language：Japanese   Book type：General book, introductory book for general audience

Event date： 2017.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Sydney University, Sydney   Country：Australia  

Event date： 2017.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Sydney University, Sydney   Country：Australia  

Event date： 2017.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Sydney University, Sydney   Country：Australia  

Event date： 2017.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Helsingør   Country：Denmark  

Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：筑波大学   Country：Japan  

Event date： 2016.12

Language：English   Presentation type：Oral presentation (general)  

Venue：那覇市・タイムスビル   Country：Japan  

Event date： 2016.11 - 2016.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Fremantle, Western Australia   Country：Australia  

Event date： 2016.6 - 2016.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Pacifico Yokohama   Country：Japan  

Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Hawaii Convention Center   Country：United States  

Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Hawaii Convention Center   Country：United States  

Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Hawaii Convention Center   Country：United States  

Event date： 2016.5

Language：English   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2016.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2016.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：早稲田大学   Country：Japan  

Event date： 2015.7 - 2015.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2015.7 - 2015.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2015.7 - 2015.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2015.7 - 2015.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2015.7 - 2015.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2015.5

Language：English   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

The geomorphology of shallow coastal regions has been modulated by repeated subaerial and submarine processes during glacio-eustatic sea-level change. However, in contrast to the vast knowledge that has been accumulated regarding terrestrial landforms, few previous studies have dealt with shallow seafloor landforms, which represent former terrestrial landscapes modified by present marine processes, from a geomorphological perspective.A broadband multibeam echosounder (Sonic 2022, R2 Sonic, LLC) and its accessory system were introduced to H. Kan’s laboratory in 2010 using JSPS Grant-in-Aid for Scientific Research A. We have carried out our bathymetric survey in Kume, Ishigaki, Kikai Islands and the southeastern and northwestern coasts of Okinawa Island in the Ryukyus, southwestern Japan since 2010.The Sonic 2022 has a variable ultrasonic frequency of 200 to 400 kHz, 256 ultrasonic beams and selectable swath coverage of 10 to 160 degrees. The typical ultrasonic beam widths parallel and orthogonal to the direction of travel are within one degree of each other when an ultrasonic frequency of 400 kHz is selected. We used a VS111 GPS compass system with A20 and A30 antennas (Hemisphere Inc.) combined with a dynamic motion sensor (DMS-10, Teledyne TSS Ltd.), a sea surface sound velocity sensor (miniSVS, Valeport Ltd.), a sound velocity profiler (MicroSVP, AML Oceanographic Ltd.). Overlap of at least ~20% (typically ~50%) was implemented throughout the bathymetric survey to ensure 100% coverage of the surveyed area. The minimum and maximum depth was 1m and 400m, respectively. The HYPACK2010 software was used for both hydrographic survey and data processing. IVS3D Fledermaus was used for three-dimensional visualization. We conducted geomorphological studies of the coastal seafloor in the coral reef areas of the Ryukyu Islands based on our high-resolution bathymetric map with a grid size of 1 m combined with SCUBA diving observations. For example, the submerged tropical karst features were discovered in Nagura Bay, Ishigaki Island (Kan et al. 2015). This is the first description of submerged humid tropical karst using multibeam bathymetry. Along with the geomorphological studies, we have also started biological and archeological studies in our bathymetric areas to promote interdisciplinary researches which link natural and human sciences.

Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：日本大学   Country：Japan  

Event date： 2014.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Moscone Convention Center, San Francisco   Country：United States  

Submerged tropical karst features were discovered in Nagura Bay on Ishigaki Island in the South Ryukyu Islands, Japan. This is the first description of submerged humid tropical karst using multibeam bathymetry. We conducted a broadband multibeam survey in the central area of Nagura Bay (1.85 × 2.7 km) and visualized the high-resolution bathymetric results with a grid size of 1 m over a depth range of 1.6–58.5 m. Various types of humid tropical karst landforms were found to coexist within the bay, including fluviokarst, doline karst, cockpit karst, polygonal karst, uvalas, and mega-dolines.
We assume that Nagura Bay was a large karst basin in which older limestone remained submerged, thus preventing corrosion and the accumulation of reef sediments during periods of submersion, whereas the limestone outcropping on land was corroded during multiple interglacial and glacial periods. Based on our bathymetric result together with aerial photographs of the coastal area, we conclude that the submerged karst landscape has likely developed throughout the whole of Nagura Bay, covering an area of ~6 × 5 km. Accordingly, this area hosts the largest submerged karst in Japan.
We also observed abundant coral communities during our SCUBA observations. The present marine conditions of Nagura Bay are characterized by low energy (calm sea) and low irradiance owing to the terrestrial influence. Such conditions have been emphasized by the presence of large undulating landforms, which cause decreases in wave intensity and irradiance with depth. These characteristics have acted to establish unique conditions compared to other coral reef areas in the Ryukyu Islands. It may play an important role in supporting the regional coral reef ecosystem.

Event date： 2014.11 - 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：高知城ホール   Country：Japan  

Event date： 2024.5

Language：English   Presentation type：Oral presentation (general)  

Venue：Arendal   Country：Norway  

Event date： 2024.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：熊本大学   Country：Japan  

Event date： 2024.4

Language：Japanese  

Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2024.3

Language：English   Presentation type：Oral presentation (general)  

Venue：青山学院大   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青山学院大   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青山学院大   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2024.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Event date： 2023.11

Language：English   Presentation type：Oral presentation (general)  

Venue：仙台、東北大学   Country：Japan  

Event date： 2023.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東北大学   Country：Japan  

Event date： 2023.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東北大学   Country：Japan  

Event date： 2023.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Gwangju   Country：Korea, Republic of  

Event date： 2023.7

Language：English  

Venue：University of Rome   Country：Italy  

Event date： 2023.7

Language：English  

Venue：University of Rome   Country：Italy  

Event date： 2023.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：豊橋市自然史博物館   Country：Japan  

Event date： 2023.5

Language：English   Presentation type：Oral presentation (general)  

Venue：千葉   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都立大学   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都立大学   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都立大学   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都立大学   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：唐津市大手口センタービル・多目的ホール   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2023.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室   Country：Japan  

Event date： 2022.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：奄美市市民交流センター・マチナカホール   Country：Japan  

Event date： 2022.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：沖縄県石垣島   Country：Japan  

Event date： 2022.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：沖縄県石垣島   Country：Japan  

Event date： 2022.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学農学部   Country：Japan  

Event date： 2022.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：石垣市役所   Country：Japan  

Event date： 2022.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Coimbra   Country：Portugal  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学（オンライン開催）   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学（オンライン開催）   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学（オンライン開催）   Country：Japan  

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2021.11

Language：English   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Australia  

Event date： 2021.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.5 - 2021.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.5 - 2021.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学共進化社会イノベーション施設大会議室または、オンライン   Country：Japan  

Event date： 2020.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.7

Language：English   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.7

Language：English   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.7

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：駒沢大学, 東京   Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：駒沢大学, 東京   Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：駒沢大学, 東京   Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：駒沢大学, 東京   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学共進化社会イノベーション施設大会議室，福岡   Country：Japan  

Event date： 2020.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学　椎木講堂   Country：Japan  

Event date： 2019.12

Language：English   Presentation type：Oral presentation (general)  

Venue：San Francisco  

Event date： 2019.11

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：与那国町DIDI交流館   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Event date： 2019.10 - 2012.10

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：喜界島役場   Country：Japan  

Event date： 2019.9

Language：English   Presentation type：Oral presentation (general)  

Venue：熊本大学   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：English   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：English   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：English   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：幕張メッセ国際会議場   Country：Japan  

Event date： 2019.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪市立自然史博物館   Country：Japan  

Event date： 2019.3

Language：Japanese  

Venue：専修大学   Country：Japan  

Event date： 2019.3

Language：Japanese  

Venue：専修大学   Country：Japan  

Event date： 2019.3

Language：Japanese  

Venue：専修大学   Country：Japan  

Event date： 2019.1

Language：Japanese  

Venue：福岡大学   Country：Japan  

Event date： 2019.1

Language：English  

Country：Japan  

Event date： 2019.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2019.1

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2019.1

Language：English  

Venue：St. Charles Convention Center in Saint Charles  

Event date： 2018.12

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.11

Language：Japanese  

Venue：琉球大学   Country：Japan  

Event date： 2018.11

Language：Japanese  

Venue：琉球大学   Country：Japan  

Event date： 2018.9 - 2018.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Biograd na moru   Country：Croatia  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.9

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2018.6

Language：Japanese  

Venue：九州大学   Country：Japan  

Event date： 2018.1

Presentation type：Symposium, workshop panel (public)  

Venue：九州大学   Country：Japan  

Event date： 2015.1

Language：English   Presentation type：Oral presentation (general)  

Venue：Palm Beach County Convention Center, Florida   Country：United States  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：富山大学   Country：Japan  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学柏キャンパス   Country：Japan  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学大気海洋研究所   Country：Japan  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Venue：長崎県西海市西彼成年の家   Country：Japan  

Event date： 2014.5

Language：English   Presentation type：Oral presentation (general)  

Venue：Honolulu, Hawaii   Country：United States  

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 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.

Other Link： http://www.apconf.org/

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京   Country：Japan  

Language：English   Presentation type：Oral presentation (general)  

Venue：九州大学I2CNERホール前   Country：Japan  

Language：English   Presentation type：Oral presentation (general)  

Venue：九州大学稲盛財団記念館   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州産業大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：ベルサール新宿グランド コンファレンスセンター   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：石垣市民会館大ホール   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学椎木講堂第2講義室   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：西海市大瀬戸コミュニティセンター   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学椎木講堂大会議室   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：石垣市民会館   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：アマホームPLAZA(奄美市市民交流センター)   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学 共進化社会システムイノベーション施設　2階ホール   Country：Japan  

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：JR博多シティ会議室   Country：Japan  

Language：Japanese  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Type：Competition, symposium, etc. 

Number of participants：354

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：1

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：94

Type：Competition, symposium, etc. 

Number of participants：406

Type：Peer review 

Number of peer-reviewed articles in Japanese journals：1

Type：Competition, symposium, etc. 

Number of participants：16

Type：Competition, symposium, etc. 

Number of participants：20

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：508

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：1

Type：Competition, symposium, etc. 

Number of participants：60

Type：Competition, symposium, etc. 

Number of participants：20

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：1

Number of peer-reviewed articles in Japanese journals：1

Type：Competition, symposium, etc. 

Number of participants：266

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc.