*Yoshiya Usui^1,2, Yasuo Ogawa^1,2, Koki Aizawa³, Wataru Kanda^1,2, Takeshi Hashimoto⁴, Takao Koyama⁵, Yusuke Yamaya⁶, Masaaki Mishina, Tsuneomi Kagiyama⁷ (1.Graduate School of Science, Tokyo Institute of Technology, 2.Volcanic Fluid Research Center, Tokyo Institute of Technology, 3.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 4.Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University, 5.Volcano Research Center, Earthquake Research Institute, University of Tokyo, 6.Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, 7.Aso Volcanological Laboratory Institute for Geothermal Sciences Graduate School of Science Kyoto University)

*Takao Koyama¹, Takayuki Kaneko¹, Takao Ohminato¹, Atsushi Watanabe¹, Wataru Kanda² (1.Earthquake Research Institute, University of Tokyo, 2.Tokyo Institute of Technology)

*Kaori Seki¹, Wataru Kanda², Toshiya Tanbo³, Takeshi Ohba⁴, Yasuo Ogawa², Shinichi Takakura⁵, Kenji Nogami², Masashi Ushioda⁵, Atsushi Suzuki¹, Zenshiro Saito¹, Yasuo Matsunaga¹ (1.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2.Volcanic Fluid Research Center, Tokyo Institute of Technology, 3.Tateyama Caldera Sabo Museum, Toyama Prefecture, 4.Department of Chemistry, Tokai University, 5.National Institute of Advanced Industrial Science and Technology)

*Akihiko Terada¹, Yuri Sakamoto¹, Wataru Kanda¹, Yasuo Ogawa¹ (1.Volcanic Fluid Research Center, Tokyo Institute of Technology)

*Taro Shiotani¹, Mitsuru Utsugi⁵, Koki Aizawa², Makoto Uyeshima³, Takao Koyama³, Wataru Kanda⁴, Tsuneomi Kagiyama⁵ (1.Graduate School of Science, Kyoto University, 2.Institute of Seismology and Volcanology, Kyushu University, 3.Earthquake Research Institute, Tokyo University,Japan, 4.Volcanic Fluid Research Center, Tokyo Tech.,Japan, 5.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University, 6.Technical Division Graduate School of Science, Kyoto University)

*Takahiro Kishita¹, Wataru Kanda², Shinichi Takakura³, Kaori Seki¹, Yasuo Matsunaga¹ (1.EPS, Tokyo Tech., 2.VFRC, Tokyo Tech., 3.AIST)

*Yasuo Matsunaga¹, Wataru Kanda², Shinichi Takakura³, Takao Koyama⁴, Yasuo Ogawa², Kaori Seki¹, Atsushi Suzuki¹, Zenshiro Saito¹ (1.Department of Earth and Planetary Sciences, Graduate School of Science, Tokyo Institute of Technology, 2.Volcanic Fluid Research Center, Tokyo Institute of Technology, 3.National Institute of Advanced Industrial Science and Technology, 4.Earthquake Research Institute, University of Tokyo)

*Tomoyoshi Kuwahara¹, Akihiko Terada², Yohei Yukutake³, Wataru Kanda², Yasuo Ogawa² (1.Graduate School of Science and Engneering, Tokyo Insutitute of Technology, 2.Volcanic Fliud Research Center, Tokyo Insutitute of Technology, 3.Hot Springs Research Institute of Kanagawa Prefecture)

*Wataru Kanda¹, Mitsuru Utsugi², Yasuo Ogawa¹ (1.Volcanic Fluid Research Center, Tokyo Institute of Technology, 2.Institute for Geothermal Sciences, Graduate School of Science, Kyoto University)

*Koki Aizawa¹, Hisafumi Asaue², Katsuaki Koike³, Shinichi Takakura⁴, Nobuo Matsushima⁴, Maki Hata⁴, Tohru yoshinaga⁵, Takeshi Hashimoto⁶, Mitsuru Utsugi⁷, Hiroyuki Inoue⁷, Taro Shiotani¹³, Makoto Uyeshima⁸, Takao Koyama⁸, Wataru Kanda⁹, Kazunari Uchida¹, Yuko Tsukashima¹, Azusa Shito¹, Shiori Fujita¹², Asuma Wakabayashi¹², Kaori Tsukamoto¹², Takeshi Matsushima¹, Ryokei Yoshimura¹⁰, Ken'ichi Yamazaki¹⁰, Shintaro Komatsu¹⁰, Makoto Tamura¹¹, The 2016 Kumamoto earthquake research group (1.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 2.Laboratory on Innovative Techniques for Infrastructures, Kyoto University, 3.Graduate School of Engineering and Faculty of Engineering, Kyoto University, 4.National Institute of Advanced Industrial Science and Technology, 5.Kumamoto University, 6.Hokkaido University, 7.Kyoto University, 8.Earthquake Research Institute, University of Tokyo, 9.Volcanic Fluid Research Center, Tokyo Institute of Technology, 10.Disaster Prevention Research Institute, Kyoto University, 11.Hokkaido Research Organization, Geological Survery of Hokkaido, 12.Department of Earth and Planetary Sciences, Kyushu University, 13.Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University)

*Koki Aizawa¹, Hisafumi Asaue², Katsuaki Koike³, Shinichi Takakura⁴, Nobuo Matsushima⁴, Maki Hata⁴, Tohru yoshinaga⁵, Takeshi Hashimoto⁶, Mitsuru Utsugi⁷, Hiroyuki Inoue⁷, Taro Shiotani¹³, Makoto Uyeshima⁸, Takao Koyama⁸, Wataru Kanda⁹, Kazunari Uchida¹, Yuko Tsukashima¹, Azusa Shito¹, Shiori Fujita¹², Asuma Wakabayashi¹², Kaori Tsukamoto¹², Takeshi Matsushima¹, Ryokei Yoshimura¹⁰, Ken'ichi Yamazaki¹⁰, Shintaro Komatsu¹⁰, Makoto Tamura¹¹, The 2016 Kumamoto earthquake research group (1.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 2.Laboratory on Innovative Techniques for Infrastructures, Kyoto University, 3.Graduate School of Engineering and Faculty of Engineering, Kyoto University, 4.National Institute of Advanced Industrial Science and Technology, 5.Kumamoto University, 6.Hokkaido University, 7.Kyoto University, 8.Earthquake Research Institute, University of Tokyo, 9.Volcanic Fluid Research Center, Tokyo Institute of Technology, 10.Disaster Prevention Research Institute, Kyoto University, 11.Hokkaido Research Organization, Geological Survery of Hokkaido, 12.Department of Earth and Planetary Sciences, Kyushu University, 13.Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University)