Yuma Hayashi¹, Tetsuya Sakuyama¹, Kenji Shimizu², Takayuki Ushikubo³, Takeshi Hanyu⁴, Jun-Ichi Kimura⁴ and Wei Tian⁵, (1)Osaka City University, Science, Osaka, Japan, (2)JAMSTEC, Kochi, Japan, (3)Kochi Institute for Core Sample Research, Kochi, Japan, (4)JAMSTEC, Yokosuka, Japan, (5)Peking University, Beijing, China