*Fahmida Parvin¹, Osamu Seki¹, Yoshinori Iizuka¹, Sumito Matoba¹, Ken Sawada² (1.Intitute of Low Temperature Science, Hokkaido University, 2.Faculty of Science, Hokkaido University)

*Iizuka Yoshinori¹, Koji Fujita², Shohei Hattori³, Ryu Uemura⁴, Osamu Seki¹, Chihiro Miyamoto⁵, Toshitaka Suzuki⁶, Naohiro Yoshida^3,7, Hideaki Motoyama⁸, Sumito Matoba¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 5.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 6.Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University, 7.Earth-Life Science Institute, Tokyo Institute of Technology, 8.National Institute of Polar Research)

*Iizuka Yoshinori¹, Koji Fujita², Shohei Hattori³, Ryu Uemura⁴, Osamu Seki¹, Chihiro Miyamoto⁵, Toshitaka Suzuki⁶, Naohiro Yoshida^3,7, Hideaki Motoyama⁸, Sumito Matoba¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 5.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 6.Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University, 7.Earth-Life Science Institute, Tokyo Institute of Technology, 8.National Institute of Polar Research)

*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)

*Osamu Seki¹ (1.Institute of Low Temperature Science, Hokkaido University)

*Kenji Kawamura^1,2,3, Shin Sugiyama⁴, Ryu Uemura⁶, Hideaki Motoyama^1,2, Takanobu Sawagaki⁵, Iizuka Yoshinori⁴, Kazuho Horiuchi⁷, Shuji Aoki⁸, Kumiko Goto-Azuma^1,2, Shuji Fujita^1,2, Osamu Seki⁴, Motohiro Hirabayashi¹, Ikumi Oyabu¹ (1.National Institute of Polar Research, Research Organization of Information and Systems, 2.SOKENDAI, 3.JAMSTEC, 4.Hokkaido University, 5.Hosei University, 6.University of Ryukyus, 7.Hirosaki University, 8.Tohoku 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)

*Tomohisa Irino¹, Keisuke Hirai², Osamu Seki³, James Hooper⁴, Samuel K. Marx⁴ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Faculty of Science, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University, 4.University of Wollongong)

*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)

*Tomohisa Irino¹, Keisuke Hirai², Osamu Seki³, James Hooper⁴, Samuel K. Marx⁴ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Faculty of Science, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University, 4.University of Wollongong)