*Glen Snyder¹, Ryo Matsumoto¹, Naizhong Zhang¹, Yohey Suzuki², Yoshihiro Kakizaki², Yuji Sano³, Naoto Takahata³, Kentaro Tanaka³, Takumi Imajo⁴, Hitoshi Tomaru⁵, Aya Iguchi⁵ (1.Gas Hydrate Research Laboratory, Meiji Univeristy, 2.Graduate School of Science, The University of Tokyo, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 5.Department of Earth Sciences, Chiba University)

*Aya Iguchi¹, Hitoshi Tomaru¹, Tatsuya Motegi², Naoto Ishida², Ryo Matsumoto³ (1.Graduate School of Science and Engineering, Chiba University, 2.Graduate School of Engineering,Tottori University, 3.Gas Hydrate Research Laboratory Meiji University)

*Aya Iguchi¹, Hitoshi Tomaru¹, Tatsuya Motegi², Naoto Ishida², Ryo Matsumoto³ (1.Graduate School of Science and Engineering, Chiba University, 2.Graduate School of Engineering,Tottori University, 3.Gas Hydrate Research Laboratory Meiji University)