*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)

*Saiko Sugisaki¹, Andrew Murray², Jan-Pieter Buylaert^2,3, Ryuji Tada⁴, Yasufumi Satoguchi⁶, Yoshitaka Nagahashi⁵, Ken Ikehara¹, Tomohisa Irino⁷, Richard W. Murray⁸, Carlos A. Alvarez-Zarikian⁹ (1.Geological Survey of Japan, AIST, 2.Aarhus University, 3.Technical University of Denmark, 4.The University of Tokyo, 5.Fukushima University, 6.Lake Biwa Museum, 7.Hokkaido University, 8.Boston University, 9.Texas A&M University)

*Saiko Sugisaki¹, Andrew Murray², Jan-Pieter Buylaert^2,3, Ryuji Tada⁴, Yasufumi Satoguchi⁶, Yoshitaka Nagahashi⁵, Ken Ikehara¹, Tomohisa Irino⁷, Richard W. Murray⁸, Carlos A. Alvarez-Zarikian⁹ (1.Geological Survey of Japan, AIST, 2.Aarhus University, 3.Technical University of Denmark, 4.The University of Tokyo, 5.Fukushima University, 6.Lake Biwa Museum, 7.Hokkaido University, 8.Boston University, 9.Texas A&M University)

*Satoshi Furota¹, Ken Sawada¹, Chiaki Aoyagi¹, Tomohisa Irino², Yaeko Igarashi³ (1.Department of Natural Histry Science ,Faculty of Science,Hokkaido University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute for Paleoenvironment of Northern Regions)

*Shunsuke Kurokawa¹, Ryuji Tada¹, Tomohisa Irino², Arisa Seki¹, Masafumi Murayama³ (1.Graduate School of Science,The University of Tokyo, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Faculty of Agriculture and Marine Science, Kochi University)

*Satoshi Takahashi¹, Ryuji Tada¹, Arisa Seki¹, Tomohisa Irino² (1.Department of Earth and Planetary Science, University of Tokyo, 2.Faculty of Environmental Earth Science, Hokkaido University)

*Tomohisa Irino¹, Mui Fa Alison Lee², Ryuji Tada³ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Graduate School of Environmental Science, Hokkaido University, 3.Graduate School of Science, University of Tokyo)

*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)

*Ken Sawada¹, Chiaki Aoyagi¹, Satoshi Furota¹, Tomohisa Irino², Yaeko Igarashi³ (1.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute for Paleoenvironment of Northern Regions)

*Takuya Sagawa¹, Yoshitaka Nagahashi², Yasufumi Satoguchi⁶, Takuya Itaki³, Ann Holbourn⁷, Ken Ikehara³, Tomohisa Irino⁴, Ryuji Tada⁵ (1.Institute of Science and Engineering, Kanazawa University, 2.Faculty of Symbiotic Systems Science, Fukushima University, 3.Geological Survey of Japan, AIST, 4.Faculty of Environmental Earth Science, Hokkaido University, 5.Department of Earth and Planetary Science, The University of Tokyo, 6.Lake Biwa Museum, 7.Institute of Geosciences, Christian-Albrechts-University)

*Ryuji Tada¹, Ke WANG¹, Keita Saito¹, Hongbo Zheng⁶, Yoshiaki Suzuki¹, Saiko Sugisaki², Kana Nagashima⁵, Masao Uchida⁷, Tomohisa Irino⁴, Takeshi Nakagawa⁸, Yoshimi Kubota³, Katsunori Kimoto⁵, Takuya Itaki² (1.Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo, 2.Geological Survey of Japan, AIST, 3.National Museum of Nature and Science, 4.Hokkaido University, 5.JAMSTEC, 6.Yunnan University, 7.National Institute for Environmental Studies, 8.Ritsumeikan University)

*Satoshi Furota¹, Ken Sawada¹, Chiaki Aoyagi¹, Tomohisa Irino², Yaeko Igarashi³ (1.Department of Natural Histry Science ,Faculty of Science,Hokkaido University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute for Paleoenvironment of Northern Regions)

*Shunsuke Kurokawa¹, Ryuji Tada¹, Tomohisa Irino², Arisa Seki¹, Masafumi Murayama³ (1.Graduate School of Science,The University of Tokyo, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Faculty of Agriculture and Marine Science, Kochi University)

*Satoshi Takahashi¹, Ryuji Tada¹, Arisa Seki¹, Tomohisa Irino² (1.Department of Earth and Planetary Science, University of Tokyo, 2.Faculty of Environmental Earth Science, Hokkaido University)

*Tomohisa Irino¹, Mui Fa Alison Lee², Ryuji Tada³ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Graduate School of Environmental Science, Hokkaido University, 3.Graduate School of Science, University of Tokyo)

*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)

*Masanobu Yamamoto¹, Michinobu Kuwae², Yudai Segawa¹, Tomohisa Irino¹, Ken Ikehara³, Keiji Takemura⁴ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Center for Marine Environmental Studies, Ehime University, 3.National Institute of Advanced Industrial Sceince and Technology, 4.Institute for Geothermal Science, Kyoto 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)

*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)

*Masafumi MURAYAMA^1,3, Kodai YAMASHITA², Yuhji YAMAMOTO³, Tomohisa Irino⁴ (1.Faculty of Agriculture and Marine Science, Kochi University, 2.Graduate School of Integrated Arts and Sciences, Kochi University, 3.Center for Advanced Marine Core Research, Kochi University, 4.Faculty of Environmental Earth Science, Hokkaido 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)

*Masafumi MURAYAMA^1,3, Kodai YAMASHITA², Yuhji YAMAMOTO³, Tomohisa Irino⁴ (1.Faculty of Agriculture and Marine Science, Kochi University, 2.Graduate School of Integrated Arts and Sciences, Kochi University, 3.Center for Advanced Marine Core Research, Kochi University, 4.Faculty of Environmental Earth Science, Hokkaido University)