*Junji Yamamoto¹, Tetsuma Kawano², Naoto Takahata³, Yuji Sano³ (1.Hokkaido University Museum, 2.Graduate School of Science, Hokkaido University, 3.Atmosphere and Ocean Research Institute)

*Yoji Arakawa¹, Daisuke Endo², Junya Oshika³, Taro Shinmura⁴, Kei Ikehata¹ (1.Earth Evolution Sciences, Faculty of Life and Environmental Sciences, University of Tsukuba, 2.Shimane Prefectural Sanbe Nature Museum Sahimeru (Shimane) , 3.Earth Resoueces Faculty, China University of Geosciences, 4.Faculty of Economics, Kumanoto-Gakuen University)

*Yasuhiro Hirai^1,2, Yoshihiko Tamura², Kaj Hoernle³, Christian Timm⁴, Folkmar Hauff³, Reinhard Werner³, Bogdan Vaglarov², Qing Chang², Takashi Miyazaki², Jun-Ichi Kimura² (1.Graduate School of Natural Science and Technology, Kanazawa University, Japan, 2.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa, Japan, 3.GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany, 4.GNS Science, Lower Hutt, New Zealand)

*Chris Conway¹, Katy Chamberlain², Yumiko Harigane¹, Daniel Morgan³ (1.Geological Survey of Japan, 2.Univ. Derby, 3.Univ. Leeds)

*Hajime Taniuchi¹, Takeshi Kuritani^2,3, Tetsuya Yokoyama^4,3, Eizo Nakamura³, Mitsuhiro Nakagawa² (1.Department of Natural History Science, Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Science, Faculty of Science, Hokkaido University, 3.Institute for Planetary Materials, Okayama University, 4.Department of Earth and Planetary Sciences, Tokyo Institute of Technology)

*Georg F Zellmer¹, Jun-Ichi Kimura², Claudine Stirling³, Gert Lube¹, Phil A Shane⁴ (1.Volcanic Risk Solutions, Massey University, Tennent Drive, Palmerston North 4410, New Zealand, 2.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology [JAMSTEC], Natsushima-cho 2-15, Yokosuka 237-0061, Japan, 3.Department of Chemistry, University of Otago, Dunedin 9054, New Zealand, 4.School of Environment, University of Auckland, Auckland 1142, New Zealand)