*Tadahiro Hatakeyama¹, Yuhji Yamamoto², Chie Kato³, Yu Kitahara³, Masao OHNO³ (1.Institute of Frontier Science and Technology, Okayama University of Science, 2.Marine Core Research Institute, Kochi University, 3.Graduate School of Integrated Sciences for Global Society, Kyushu University)

*Yu Kitahara¹, Thi Phuong Lan Luu², Van Tho Nguyen³, Hoang Bach Linh Nguyen⁴, Tadahiro Hatakeyama⁵, Yuhji Yamamoto¹, Chie Kato⁶, Masao Ohno⁶, Mariko Yamagata⁷ (1.Marine Core Research Institute, Kochi University, 2.Institute of Geophysics, Vietnam Academy of Science and Technology, 3.Management Board for MySon Cultural Heritage, 4.Division of Humanities, Graduate School of Human and Socio-Environmental Studies, Kanazawa University, 5.Research Institute of Frontier Science and Technology, Okayama University of Science, 6.Faculty of Social and Cultural Studies, Kyushu University, 7.Curator Course, Certification Courses, Rikkyo University)

Ryunosuke Maeda¹, Yu Kitahara², Tetsuya Yamamoto³, *Yuhji Yamamoto² (1.Faculty of Science and Technology, Kochi University, 2.Marine Core Research Institute, Kochi University, 3.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)