*Glen Snyder¹、Hitoshi Tomaru²、Yoshinori Ono²、Natsuki Kaneko²、Natsuki Oneda²、Yoshiki Honma²、Shinsuke Aoki³、Yasumasa Sakai⁵、Gen Takatori⁵、Shohei Ito⁴、Hashimoto Yuichi⁷、Ryo Matsumoto⁶ (1.Atmosphere and Ocean Research Institute, University of Tokyo、2.Department of Earth Sciences, Chiba University、3.Faculty of Agriculture, Kagawa University、4.FullDepth Co. LTD. 、5.Graduate School of Maritime Sciences, Kobe University、6.Gas Hydrate Research Lab, Meiji University、7.Toyama Bay Lab)