*Akihiro Hachikubo¹, Keito Kakizaki¹, Hiroshi Ohno¹, Satoshi Takeya² (1.Kitami Institute of Technology, 2.National Institute of Advanced Industrial Science and Technology (AIST))

Takahiro Ozeki¹, *Akihiro Hachikubo¹, Hiroshi Ohno¹, Satoshi Takeya² (1.Kitami Institute of Technology, 2.National Institute of Advanced Industrial Science and Technology (AIST))

Keito Kakizaki¹, *Akihiro Hachikubo¹, Satoshi Takeya² (1.Kitami Institute of Technology, 2.National Institute of Advanced Industrial Science and Technology (AIST))

*Koji Yamamoto¹, Xiaoxing Wang², Takayuki Kanno², Xiaowei Wang³ (1.Japan Oil, Gas, and Metals National Corporation, 2.Schlumberger K. K., 3.Baker Hughes Inc.)

*Toshiaki Kobayashi¹, Tatsuo Saeki¹, Tetsuya Fujii¹, Takao Inamori², Yousuke Teranishi², Hiroo Takahashi³, Fumihide Kobayashi⁴ (1.Japan Oil, Gas and Metals National Corporation, 2.JGI,Inc., 3.OCC Corporation, 4.Kokusai Cable Ship Co., Ltd.)

*AKIRA FUJIMOTO¹, Tetsuya Fujii¹ (1.Japan Oil, Gas and Metals National Corporation)

*Mamata Tsuyoshi¹, Ryosuke Nakajima¹, Hitoshi Tomaru¹, Ryo Matsumoto² (1.Department of Earth Sciences, Chiba University, 2.Gas Hydrate Laboratory, Meiji University)

*Ryohei Kameda¹, Yoshihiro Kakizaki², Hitoshi Tomaru¹, Ryo Matsumoto² (1.Faculty of Science,Chiba University, 2.Gas Hydrate Laboratory, Meiji University)

*Tatsuya Motegi¹, Naoto Ishida¹, Takao Ebinuma¹ (1.Department of Management of Social Systems and Civil Engineering, Graduate School of Engineering, Tottori University)

*Aya Iguchi¹, Hitoshi Tomaru¹, Tatsuya Motegi², Naoto Ishida², Ryo Matsumoto³ (1.Chiba University, 2.Tottori University, 3.Meiji University)

*Minori Chikada¹, Hitoshi Tomaru¹, Ryo Matsumoto² (1.Faculty of Science, Chiba University, 2.Organization for the Strategic Laboratory of Research and Intellectual Properties, Meiji University)

*Aung Than TIn¹, Naoya Wada², Makoto Tanaka¹, Yuhei Komatsu³, Tetsuya Fujii¹, Kiyofumi Suzuki¹ (1.Japan Oil, Gas and Metals National Corporation, 2.Schlumberger K.K., 3.Japan Oil Engineering Co. Ltd.)