*Kenji Shimizu¹, Norikatsu Akizawa², Akira Ishikawa³, Tetsu Kogiso⁴, Takayuki Ushikubo¹ (1.JAMSTEC, 2.Tokyo University, 3.Tokyo Institute of Technology, 4.Kyoto University)

*Itaru Mitsukawa¹, Yohei Igami¹, Tetsu Kogiso¹, Norikatsu Akizawa², Akira Miyake¹ (1.Kyoto University, 2.University of Tokyo)

*Jonathan E Snow¹, Atlanta Sen², Yasuhiko Ohara^3,4,5, Ken-ichi Hirauchi⁶, Yui Kouketsu⁵, Alessio Sanfilippo⁷, Valentin Basch⁷, Yumiko Harigane⁸, Masakazu Fujii⁹, Kyoko Okino¹⁰, Norikatsu Akizawa¹⁰ (1.Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA, 2.Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, USA, 3.Hydrographic and Oceanographic Department of Japan, Tokyo 100-8932, Japan, 4.Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan, 5.Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan, 6.Department of Geosciences, Faculty of Science, Shizuoka University, Shizuoka, Japan, 7.Dipartimento di Scienze della Terra e dell'Ambiente, University of Pavia, Pavia, Italy, 8.Research Institute of Geology and Geoinformation, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan, 9.National Institute of Polar Research/SOKENDAI, Tokyo, Japan, 10.Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan)

*Kazuto Mikuni¹, Naoto Hirano¹, Norikatsu Akizawa², Shiki Machida³, Hirochika Sumino², Akihiro Tamura⁴, Tomoaki Morishita⁴ (1.Tohoku Univ., 2.Univ. Tokyo, 3.Chiba Inst. Tech., 4.Kanazawa Univ.)

*Norikatsu Akizawa^1,2, Akira Ishikawa³, Tetsu Kogiso⁴, Katsuhiko Suzuki⁵, Akira Miyake⁶, Itaru Mitsukawa⁶ (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Macquarie University, 3.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 4.Graduate School of Human and Environmental Studies, Kyoto University, 5.Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology, 6.Department of Geology and Mineralogy, Kyoto University)

*Norikatsu Akizawa^1,3, Akira Ishikawa², Yuka Niwa², Olivier Alard³, Yoann Gréau³, Naoto Hirano⁴, Shiki Machida⁵ (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 3.Macquarie University, 4.Center for Northeast Asian Studies, Tohoku University, 5.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology)

*Taro KIDO¹, Norikatsu Akizawa², Mariko Kouduka¹, Yohey Suzuki¹ (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Division of Ocean-Earth System Science, The University of Tokyo)

*Itaru Mitsukawa¹, Yohei Igami¹, Yoshio Takahashi², Shohei Yamashita³, Takahiro Kawai², Tetsu Kogiso¹, Norikatsu Akizawa², Akira Miyake¹ (1.Kyoto University, 2.University of Tokyo, 3.High Energy Accelerator Research Organization (KEK))