*Reishi Takashima¹, Keiichi Hayashi², Junichiro Kuroda⁴, Hayu Ota⁴, Hiroyuki Hoshi³, Yuji Orihashi⁵, Hiroshi Nishi⁶, Toshiro Yamanaka⁸, Ken Sawada⁷, Kazuo Hayashi⁷, Masashi A. Ikeda⁷, Kohei Hosogaya¹, Yoshihiro Asahara⁹ (1.Tohoku University, 2.Hokkaido Research Organization, 3.Aichi University of Education, 4.The University of Tokyo, 5.Hirosaki University, 6.Fukui Prefectural University, 7.Hokkaido University, 8.Tokyo University of Marine Science and Tehnology, 9.Nagoya University)

*Hayu Ota¹, Junichiro Kuroda¹, Akira Ishikawa², Katsuhiko Suzuki³, Reishi Takashima⁴ (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.Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology, 4.Tohoku University Museum, Tohoku University)

*Hayu Ota¹, Junichiro Kuroda¹, Maria Luisa Tejada², Akira Ishikawa³, Katsuhiko Suzuki², Naohiko Ohkouchi² (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Department of Earth and Planetary Sciences, Tokyo institute of Technology)