*Satoshi OKUZUMI¹, Hidekazu TANAKA² (1.Graduate School of Science and Engineering, Tokyo Institute of Technology, 2.Institute of Low Temperature Science, Hokkaido University)

Tomoaki FUJITA¹, *Hidenori GENDA², Hiroshi KOBAYASHI³, Hidekazu TANAKA⁴, Yutaka ABE¹ (1.Department of Earth and Planetary Science, University of Tokyo, 2.Earth-Life Sicence Institute, Tokyo Institute of Technology, 3.Department of Physics, Nagoya University, 4.Institute of Low Temperature Science, Hokkaido University)

*Hiroshi KOBAYASHI¹, Hidekazu TANAKA², Satoshi OKUZUMI³ (1.Nagoya University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Tokyo Institute of Technology)

*Satoshi OKUZUMI¹, Hidekazu TANAKA² (1.Graduate School of Science and Engineering, Tokyo Institute of Technology, 2.Institute of Low Temperature Science, Hokkaido University)

Tomoaki FUJITA¹, *Hidenori GENDA², Hiroshi KOBAYASHI³, Hidekazu TANAKA⁴, Yutaka ABE¹ (1.Department of Earth and Planetary Science, University of Tokyo, 2.Earth-Life Sicence Institute, Tokyo Institute of Technology, 3.Department of Physics, Nagoya University, 4.Institute of Low Temperature Science, Hokkaido University)

*Kyoko TANAKA¹, Juerg DIEMAND², Raymond ANGELIL², Hidekazu TANAKA¹ (1.Institute of Low Temperature Science, Hokkaido University, 2.University of Zurich)