*Manabu Tanahashi¹, Akihiro Hiruta¹, Yutaka Yanagimoto¹, Glen Snyder¹ (1.Gas Hydrate Research Laboratory, Meiji University)

*Shiro Ohkawa¹, Akihiro Hiruta¹, Ryo Matsumoto¹ (1.Gas Hydrate Laboratory, Meiji University, Organization for the Strategic Coordination of Research and Intellectual Property)

*Ryo Matsumoto¹, Takao Ebinuma², Akihiro Hiruta¹, Naoto Ishida¹, Hitoshi Tomaru³ (1.Organization for the Strategic Laboratory of Research and Intellectual Properties, Meiji University, 2.Methane Hydrate Science, Graduate School of Engineering, Tottori University, 3.Dept of Earth Science, Faculty of Science, Chiba University)

*Yoshitaka Kakuwa¹, Akihiro Hiruta¹, Yoshihiro Kakizaki¹, Ryo Matsumoto¹ (1.Gas Hydrate Laboratory, Organization for the Strategic Coordination of Research and Intellectual Properties, Meiji University)

*Ryo Matsumoto¹, Akihiro Hiruta¹, Yoshihiro Kakizaki¹ (1.Organization for the Strategic Laboratory of Research and Intellectual Properties, Meiji University)

*Yoshihiro Kakizaki¹, Tsuyoshi Ishikawa², Tatsuya Kawai³, Akihiro Hiruta¹, Ryo Matsumoto¹ (1.Gas Hydrate Research Laboratory, Organization for Strategic Coordination, Meiji University, 2.Kochi Institute for Core Sample Research, JAMSTEC, 3.Department of Marine & Earth Sciences, Marine Works Japan Ltd.)