*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)

*Yohey Suzuki¹, Hideyoshi Yoshioka², Hitoshi Tomaru³, Ryo Matumoto⁴ (1.Graduate School of Science, The University of Tokyo, 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 3.Department of Earth Sciences, Chiba University, 4.Meiji University - Gas Hydrate Laboratory)

*Yoshinori Ono¹, Hitoshi Tomaru¹ (1.Chiba University Graduate School of Science and Engineering)