*Yuichi Niwa¹, Toshihiko Sugai², Yoshiaki Matsushima³, Shinji Toda¹ (1.International Research Institute of Disaster Science, 2.Graduate School of Frontier Science, The University of Tokyo, 3.Kanagawa Prefectural Museum of Natural History)

*Akihiro Yokota¹, Reisuke Kondo², Kiyoyuki Shigeno¹, Tatsuo Kanamaru³, Hiroshi Ushiro⁴, Hiroko Fujita⁵ (1.Meiji Consultant Co., Ltd, 2.Kogakkan University, 3.Nihon University, 4.Hokkaido Museum, 5.Hokkaido University)

*Yoshiaki Suzuki¹, Ryuji Tada¹, Tomohisa Irino², Kazuyoshi Yamada³, Kana Nagashima⁴, Takeshi Nakagawa⁵, Tsuyoshi Haraguchi⁶, Katsuya Gotanda⁷, SG12/06 Project members (1.The University of Tokyo, 2.Hokkaido University, 3.Museum of Natural and Environmental history, Shizuoka, 4.JAMSTEC, 5.Ritsumeikan University, 6.Osaka City University, 7.Chiba University of Commerce)

*Yoshiaki Suzuki¹, Ryuji Tada¹, Tomohisa Irino², Kazuyoshi Yamada³, Kana Nagashima⁴, Takeshi Nakagawa⁵, Tsuyoshi Haraguchi⁶, Katsuya Gotanda⁷, SG12/06 Project members (1.The University of Tokyo, 2.Hokkaido University, 3.Museum of Natural and Environmental history, Shizuoka, 4.JAMSTEC, 5.Ritsumeikan University, 6.Osaka City University, 7.Chiba University of Commerce)

*Ryuji Asami¹, Yuji Akamine¹, Hidetaka Genka¹, Ryotaro Matsumoto¹, Ryu Uemura¹, Yasufumi Iryu², Chuan-Chou Shen³ (1.Faculty of Science, University of the Ryukyus, 2.Graduate School of Science, Tohoku University, 3.HISPEC, National Taiwan University)

*Tomohisa Irino¹, Keisuke Hirai², Osamu Seki³, James Hooper⁴, Samuel K. Marx⁴ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Faculty of Science, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University, 4.University of Wollongong)