*Masahiko Fujii¹, Tsuneo Ono², Makoto Yamada³, Manabu Ooue⁴, Takeru Ito⁴, Jen-Han Yang^1,5, Yu Horiuchi⁶, Hisashi Oiwane⁷, Masahide Wakita⁸, Shigeki Wada⁴ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Fisheries Resources Institute, Japan Fisheries Research and Education Agency, 3.Faculty of Economics, Ryukoku University, 4.Shimoda Marine Research Center, University of Tsukuba, 5.Institute of Ocean Technology and Marine Affairs, National Cheng Kung University, Taiwan, 6.Oita Himeshima Geopark Promotion Office, 7.Musuhi Inc., 8.Mutsu Institute for Oceanography, Japan Agency for Marine-Earth Science and Technology)