*Naoshi Hirata¹, Masataka Kinoshita¹, Masanao Shinohara¹, Toshiki Watanabe¹, Hiroshi Nishi³, Yasuhiro Yamada⁵, Fumio Inagaki², Masafumi MURAYAMA⁴, Tsuyoshi Ishikawa² (1.Earthquake Research Institute, University of Tokyo, 2.KCC/JAMSTEC, 3.Center for Academic Resources and Archives, Tohoku University, 4.KCC/Kochi Univ., 5.ODS/JAMSTEC)

*Tsuyoshi Shintani¹, Kozue Nakanishi⁴, Harue Masuda¹, Masahiko Ono², Atsunao Marui², Tsuyoshi Ishikawa³, Kazuya Nagaishi⁵ (1.Graduate School of Science,Osaka University, 2.National Institute of Advanced Industrial Science and Technology, 3.Japan Agency for Marine-Earth Science and Technology, 4.Faculty of Science, Osaka City University, 5.Marin Works Japan)

*Takeshi Hanyu¹, Kenji Shimizu¹, Takayuki Ushikubo¹, Motoo Ito¹, Jun-Ichi Kimura¹, Qing Chang¹, Morihisa Hamada¹, Takahiro Ozawa², Hikaru Iwamori¹, Tsuyoshi Ishikawa¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Tokyo Institute of Technology)

*Takahiro Ozawa¹, Takeshi Hanyu², Hikaru Iwamori^2,1, Morihisa Hamada², Takayuki Ushikubo³, Kenji Shimizu³, Motoo Ito³, Jun-Ichi Kimura², Qing Chang², Tsuyoshi Ishikawa³ (1.Tokyo Institute of Technology, 2.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology, 3.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)

*Susumu Umino¹, Yuki Kusano², Keitaro Kitamura³, Kyoko Kanayama⁴, Kazuyha Nagaishi⁵, Tsuyoshi Ishikawa⁶, Ryo Otsuka¹ (1.Department of Earth Sciences, Kanazawa University, 2.Geological Survey of Japan, AIST, 3.Asia Air Survey Co., Ltd., 4.Tottori Prefectural Museum, 5.Marine Works Japan Ltd., 6.Kochi Institute for Core Sample Research, JAMSTEC)

*Tsuyoshi Ishikawa¹ (1.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)

*Shumpei Murakami¹, Koichiro Fujinaga^2,1, Junichiro Ohta^3,1, Kazutaka Yasukawa^1,2, Kentaro Nakamura¹, Yasuhiro Kato^1,2,3, Kurokawa Kyouhei⁴, Hikaru Iwamori^3,5, Nagaishi Kazuya⁶, Tsuyoshi Ishikawa³ (1.School of Engineering the University of Tokyo, 2.Chiba Institute of Technology, 3.JAMSTEC, 4.Mitsui Kushikino Mining Co., Ltd., 5.Tokyo Institute of Technology, 6.Marine Work Japan Co., Ltd.)

*Yoshihiro Kakizaki¹, Tsuyoshi Ishikawa², Tatsuya Kawai³, Akihiro Hiruta¹, Ryo Matsumoto¹ (1.Gas Hydrate Research Laboratory, Organization for Strategic Coordination, Meiji University, 2.Kochi Institute for Core Sample Research, JAMSTEC, 3.Department of Marine & Earth Sciences, Marine Works Japan Ltd.)

*Ryota Hasegawa¹, Asuka Yamaguchi², Rina Fukuchi³, Tsuyoshi Ishikawa⁴, Yujin Kitamura⁵ (1.Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima university Faculty of Science, 2.Atomosphere and Ocean Research Institute, The University of Tokyo, 3.Graduate School of Frontier Sciences, The University of Tokyo, 4.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 5.Department of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University)