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Research paper : Marine geological mapping project in the Okinawa area (K. ARAI et al.)−164−Synthesiology - English edition Vol.6 No.3 (2013) evolution of trenches around Japan, Rep. Hydr. Res., 27, 1-57 (1991).[8]K. Konishi: Geotectonic framework of the Ryukyu Islands (Nansei-shoto), Journal of the Geological Society of Japan, 71, 437-457 (1965) (in Japanese).[9]K. Arai, T. Inoue, T. TsuZino, F. Murakami and K. Ikehara: Okinawa-jima toho oki no onpa tansa (Seismic surveys of eastern Okinawa Island –preliminary results of GH08 cruise-, Marine Geological and Geophysical Studies around Okinawa Islands –eastern off of Okinawa Island- (Preliminary Reports on Researches in the 2008 Fiscal Year)), GSJ Interim Report, 46, 29-39 (2009) (in Japanese).[10]H. Watanabe: Nihon Higai Tsunami Soran (Comprehensive List of Tsunami to Hit the Japanese Islands, Second Edition), University of Tokyo Press (1998) (in Japanese).[11]J. Letouzey and M. Kimura: The Okinawa Trough: Genesis of a back-arc basin developing along a continental margin, Tectonophysics, 125 (1-3), 209-230 (1986).[12]J. O. Park, H. Tokuyama, M. Shinohara, K . Suyehiro and A. Taira: Seismic record of tectonic evolution and back-arc rifting in the southern Ryukyu island arc system, Tectonophysics, 294 (1), 21-42 (1998).[13]R. Shinjo: Geochemistry of high Mg andesites and the tectonic evolution of the Okinawa Trough-Ryukyu arc system, Chem. Geol., 157 (1-2), 69-88 (1999). [14]J. C. Sibuet, B. Deffontaines, S. K. Hsu, N. Thareau, J. P. Le Formal, C. S. Liu and ACT Party: Okinawa Trough back-arc basin: Early tectonic and magmatic evolution, J. Geophys. Res., 103 (B12), 30245-30267 (1998).[15]C. S. Lee, G. G. Shor, L. D. Bibee, R. S. Lu and T. W. C. Hilde: Okinawa Trough: Origin of a back-arc basin, Marine Geology, 35 (1-3), 219-241 (1980).[16]T. Sato, K. Arai and T. Inoue: GH11 kokai deno hanshaho onpa tansa gaiyo (Seismic survey of GH11 cruise: Spreading axis of the Okinawa Trough and gradient of shelf slope, Marine Geological and Geophysical Studies East China Sea and Okinawa Trough –Northen Okinawa Trough- (Preliminary Reports on Reseaches in the 2011 Fiscal Year)), GSJ Interim Report, 58, 46-53 (2012) (in Japanese).[17]F. J. Sawkins: Sulfide ore deposits in relation to plate tectonics, Jour. Geol., 80 (4), 377-397 (1972).[18]Expedition 331 Scientists: Deep hot biosphere, IODP Preliminary Report, 331 (2010).[19]K. Arai and K. Ikehara: Okinawa-jima shuhen no kaiyo chishitu chosa - Ryukyu Retto oyobi Higashi Shinakai no chishitsu joho seibi o mezashite (Marine geological survey around Okinawa-jima - Toward the geological information organization for Ryukyu Islands and East China Sea), AIST TODAY, 11 (6), 27 (2011) (in Japanese).AuthorsKohsaku ARAICompleted doctoral course at the Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University in 1994. Joined the Geological Survey of Japan, Agency of Industrial Science and Technology, Ministry of International Trade and Industry in 1997. Senior Researcher of the Institute for Marine Resources and Environment, AIST in 2001; Senior Researcher of the Institute of Geology and Geoinformation, AIST in 2004; and Leader of the Marine Geology Research Group, IGG, AIST from 2010. Engaged in marine geological surveys since joining AIST, and including creation and publication of marine geological maps such as Enshunada Geological Map. Led the survey since the inception of the Okinawa Project. In this paper, summarized the current state of the Okinawa Project and discussed its potential contribution to the development of submarine mineral resource.Gen SHIMODACompleted doctoral course at the Graduate School of Human and Environmental Studies, Kyoto University in 1996 (Doctor of Human and Environmental Studies). Joined Kyoto Fission-Track Co., Ltd. in 1997. Lecturer of the Institute for Geothermal Sciences, Graduate School of Science, Kyoto University in 1990 (researcher of research institution). Supporting Staff for Priority Research of the Institute of Geology and Geoinformation, AIST in 2001; Researcher of the IGG, AIST in 2005; and Leader of the Tectonics and Resources Research Group, IGG, AIST from 2012. Specialty is solid geochemistry. In this paper, described the marine surveys conducted at the potential sites of submarine mineral resources, as well as proposing solutions to survey issues.Ken IKEHARAGraduated from the Department of Education, Tokyo Gakugei University in 1982. Joined the Geological Survey of Japan, Agency of Industrial Science and Technology, Ministry of International Trade and Industry in 1982. Leader of the Marine Geology Research Group, Institute of Geology and Geoinformation, AIST from 2005; and Leader of the Marine Geological Map Project; and Deputy Director of the IGG, AIST from 2009. Engaged in marine geological survey of the ocean regions around Japan since joining AIST. Specialty is sedimentology. In this paper, as the leader of the Marine Geological Map Project, proposed the ways in which AIST should concentrate efforts to advance the development of submarine mineral resources.Discussions with Reviewers1 OverallComment (Shigeko Togashi, AIST)This paper sheds light on the current situation and issues of the geological marine survey, an AIST effort to organize the geological information in the ocean regions around Japan, carried on by the Geological Survey of Japan, especially focusing on the Okinawa Project. Its content is appropriate for a Synthesiology paper, as a discussion of the methodology for organizing the national intellectual infrastructure. In the first draft, there were some insufficiencies in the methodology development, but these were improved in the revised version.Comment (Masahiro Seto, AIST)This is a very interesting paper that discusses the significance of the marine geological survey in the Okinawa region from the perspectives of earth science, disaster prevention, and assessment of potential mineral resource sites. I think the content and composition are appropriate as a Synthesiology paper. I also hope

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