*Nachi Kurihara¹, Shunsuke Endo¹ (1. Shimane University)

*Umito Saki¹, Shunsuke Endo¹ (1. Shimane University)

*Ippei Kitano^1,2, Yasuhito Osanai², Keigo Kitamura², Nobuhiko Nakano² (1. Tochigi Prefectural Museum, 2. Kyushu University)

*Sotaro Baba¹, Kenji Horie², Tomokazu Hokada², Mami Takehara², Atsushi Kamei³, Ippei Kitano⁴, Yoichi Motoyoshi² (1. University of the Ryukyus, 2. National Institute of Polar Research, 3. Shimane University, 4. Tochigi Prefectural Museum)

*Toshiaki Shimura¹, Yuki Harada^1,2, Geoffrey Fraser³, Noriyoshi Tsuchiya⁴ (1. Yamaguchi University, 2. i-SHOT Inc., 3. Geoscience Australia, 4. Tohoku University)

*Takeshi Ikeda¹, Hayato Yodoya^1,2 (1. Kyushu University, 2. Nittetsu Mining Co., Ltd.)

*Fumiko Higashino¹, Tetsuo Kawakami¹, Tatsuro Adachi², Masaoki Uno³ (1. Kyoto University, 2. Kyushu University, 3. Tohoku University)

*Tatsuro ADACHI¹, Tetsuo KAWAKAMI², Fumiko HIGASHINO², Masaoki UNO³ (1. Kyushu University, 2. Kyoto University, 3. Tohoku University)

*Masahiro Ishikawa¹ (1. Yokohama National University)