1. Department of Ocean Technology, Policy, and Environment, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
2. Geology & Geophysics Division, Project Department, Oil & Gas Upstream Business Unit, Japan Oil, Gas and Metals National Corporation (JOGMEC), 10-1 Toranomon 2-Chome, Minato-ku, Tokyo 105-0001, Japan
3. Petroleum Engineering & Consulting Department, Japan Oil Engineering Company, Limited, Kachidoki Sun-Square, 1-7-3 Kachidoki, Chuo-ku, Tokyo 104-0054, Japan
4. Department of Systems Innovation, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
5. Methane Hydrate Research & Development Division, Japan Oil, Gas and Metals National Corporation (JOGMEC), 1-2-2 Hamada, Mihama-ku, Chiba, Chiba 261-0025, Japan
6. Energy Process Research Institute, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo, Hokkaido 062-8517, Japan