*Naoto Fukuyo¹, Hirokuni Oda¹, Chisato Anai², Kazuhiko Fujita³, John A Tarduno⁴ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.Center for Advanced marine Core Research, Kochi Univercity, 3.Department of Physics and Earth Sciences, University of the Ryukyus, 4.Department of Earth and Environmental Sciences, University of Rochester, Rochester, USA)

*Luc Michel Marie Feuillerat¹, Yasufumi Iryu^2,3, Marc André Humblet¹, Kazuhiko Fujita⁴ (1.Nagoya University, Graduate School of Environmental Studies Department of Earth and Environmental Sciences , 2.Tohoku University, Institute of Geology and Paleontology, 3.WPI-AIMEC, 4.University of the Ryukyus, Graduate School of Engineering and Science Marine and Environmental Sciences)

*Yukiko Nagai¹, Remi Tsubaki², Kazuhiko Fujita³, Jun Kawano⁴, Takashi Toyofuku^1,5 (1.JAMSTEC, 2.Eusapia Co., Ltd., 3.University of the Ryukyus, 4.Hokkaido University, 5.TUMSAT)