*Yunosuke Hase¹, Akihiro Hachikubo¹, Satoshi Yamashita¹, Hirotoshi Sakagami¹, Masaaki Konishi¹, Hirotsugu Minami¹, Kenji Nishina², Tadashi Misaka³ (1.Kitami Institute of Technology, 2.Geological Survey of Hokkaido, Hokkaido Research Organization, 3.Wakkanai Fisheries Research Institute, Hokkaido Research Organization)