*Koji Hamasaki¹, Satoru Inoue¹, Minoru Ijichi¹, Song-Il Nam², Kenta Suzuki³, Masanobu Yamamoto⁴ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Korea Polar Research Institute, 3.Graduate School of Environmental Science, 4.Faculty of Environmental Earth Science)

*Koji Hamasaki¹, Satoru Inoue¹, Minoru Ijichi¹, Song-Il Nam², Kenta Suzuki³, Masanobu Yamamoto⁴ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Korea Polar Research Institute, 3.Graduate School of Environmental Science, 4.Faculty of Environmental Earth Science)

*Michinobu Kuwae¹, Masanobu Yamamoto², Keiji Takemura³, Ken Ikehara⁴, Keitaro Yamada³, Kohei Ishishita⁵, Yuko Takamatsu⁵, Takashige Augimoto (1.Center for Marine Environmental Studies, Ehime University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute for Geothermal Sciences, Kyoto University,, 4.Research Institute of Geology and Geoinformation, Geological Survey of Japan, 5.Faculty of Science, Ehime University)

*Michinobu Kuwae¹, Masanobu Yamamoto², Keiji Takemura³, Ken Ikehara⁴, Keitaro Yamada³, Kohei Ishishita⁵, Yuko Takamatsu⁵, Takashige Augimoto (1.Center for Marine Environmental Studies, Ehime University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute for Geothermal Sciences, Kyoto University,, 4.Research Institute of Geology and Geoinformation, Geological Survey of Japan, 5.Faculty of Science, Ehime University)

*Masanobu Yamamoto¹, Takafumi Kikuchi¹, Hiromichi Sakura¹, Ryoma Hayashi², Osamu Seki³, Takayuki Omari⁴, Abdullah Sulaiman⁵, Hasrizal Bin Shaari⁶, Lurie Melling⁷ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Lake Biwa Museum, Japan, 3.Low Temperature Research Institute, Hokkaido University, Japan, 4.The University Museum, The University of Tokyo, Japan, 5.Minerals and Geoscience Department Malaysia, Malaysia, 6.Universiti Malaysia Terengganu, Malaysia, 7.Tropical Peat Research Institute, Malaysia)

Takeshi Tamura¹, Kohei Mizobata², Eiji Watanabe³, Makoto Sampei⁴, Masanobu Yamamoto⁴, Daiki Nomura⁴, Jun Nishioka⁴, Yutaka Watanabe⁴, *Tetsuo Sueyoshi¹ (1.National Institute of Polar Research, 2.Tokyo University of Marine Science and Technology, 3.Japan Agency for Marine-Earth Science and Technology, 4.Hokkaido University)

*Masanobu Yamamoto¹, Michinobu Kuwae², Yudai Segawa¹, Tomohisa Irino¹, Ken Ikehara³, Keiji Takemura⁴ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Center for Marine Environmental Studies, Ehime University, 3.National Institute of Advanced Industrial Sceince and Technology, 4.Institute for Geothermal Science, Kyoto University)

*Hiromichi Sakurai¹, Masanobu Yamamoto¹, Osamu Seki², Takayuki Omori³ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Low Temperature Research Institute, Hokkaido University , 3.The University Museum, The University of Tokyo, Japan)

*Hiromichi Sakurai¹, Masanobu Yamamoto¹, Osamu Seki², Takayuki Omori³ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Low Temperature Research Institute, Hokkaido University , 3.The University Museum, The University of Tokyo, Japan)