*Takeshi Hashimoto¹, Mitsuru Utsugi², Takahiro Ohkura², Wataru Kanda³, Akihiko Terada³, Satoshi Miura⁴, Masato Iguchi⁵ (1.Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, 2.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University, 3.Volcanic Fluid Research Center, Tokyo Institute of Technology, 4.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 5.Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University)

*Akihiko Terada¹, Wataru Kanda¹, Yasuo Ogawa¹, Hiroshi Aoyama², Mare Yamamoto³, Tomoki Tsutsui⁴, Takahiro Ohkura⁵, Rina Noguchi¹ (1.Volcanic Fluid Research Center, Tokyo Institute of Technology, 2.Institute of Seismology and Volcanology, Hokkaido University, 3.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Tohoku University, 4.Graduate School of International Resource Sciences, Akita University, 5.Aso Volcanological Laboratory, Kyoto University)

*Hirochika Sumino¹, Kaori Kawana¹, Kohei Yamane², Yoshihide Akiyama¹, Takeshi Ohba³, Muga Yaguchi⁴, Akihiko Terada⁵ (1.Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 2.Department of Integrated Science, College of Arts and Science, University of Tokyo, 3.Department of Chemistry, School of Science, Tokai University, 4.Meteorological Research Institute, Japan Meteorological Agency, 5.Volcanic Fluid Research Center, Tokyo Institute of Technology)

*Akira Katori¹, Akihiko Terada¹, Kana Nishino², Nozomi Numanami², Takeshi Ohba² (1.Volcanic Fluid Research Center, Tokyo Institute of Technology, 2.Department of chemistry, School of Science, Tokai University)

*Mare Yamamoto¹, Hiroshi Aoyama², Tomoki Tsutsui³, Akihiko Terada⁴, Wataru Kanda⁴, Yasuo Ogawa⁴ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Institute of Seismology and Volcanology, Hokkaido University, 3.Graduate School of International Resource Sciences, Akita University, 4.Volcanic Fluid Research Center, Tokyo Institute of Technology)

*Nobuko Kametani¹, Yasuo Ishizaki², Mitsuhiro Yoshimoto³, Akihiko Terada⁴ (1.Graduate School of Science and Engineering for Education, University of Toyama, 2.Graduate School of Science and Engineering, University of Toyama, 3.Mount Fuji Research Institute, Yamanashi Prefectural Government, 4.Volcanic Fluid Research Center, Tokyo Institute of Technology )

*Akira Katori¹, Akihiko Terada¹, Kana Nishino², Nozomi Numanami², Takeshi Ohba² (1.Volcanic Fluid Research Center, Tokyo Institute of Technology, 2.Department of chemistry, School of Science, Tokai University)

*Mare Yamamoto¹, Hiroshi Aoyama², Tomoki Tsutsui³, Akihiko Terada⁴, Wataru Kanda⁴, Yasuo Ogawa⁴ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Institute of Seismology and Volcanology, Hokkaido University, 3.Graduate School of International Resource Sciences, Akita University, 4.Volcanic Fluid Research Center, Tokyo Institute of Technology)

*Nobuko Kametani¹, Yasuo Ishizaki², Mitsuhiro Yoshimoto³, Akihiko Terada⁴ (1.Graduate School of Science and Engineering for Education, University of Toyama, 2.Graduate School of Science and Engineering, University of Toyama, 3.Mount Fuji Research Institute, Yamanashi Prefectural Government, 4.Volcanic Fluid Research Center, Tokyo Institute of Technology )

*Akihiko Terada¹, Yuichi Morita², Takeshi Hashimoto³, Toshiya Mori⁴, Takeshi Ohba⁵, Muga Yaguchi⁶, Wataru Kanda¹ (1.Volcanic Fluid Research Center, Tokyo Institute of Technology, 2.Earthquake Research Institute, University of Tokyo, 3.Institute of Seismology and Volcanology, Hokkaido University, 4.Geochemical Research Center, Graduate School of Science, University of Tokyo, 5.Department of Chemistry, Faculty of Science, Tokai University, 6.Meteorological Research Institute, Japan Meteorological Agency)