convener:Miho Asada(Japan Agency for Marine-Earth Science and Technology), Tomohiro Toki(Faculty of Science, University of the Ryukyus), Akira Ijiri(国立研究開発法人海洋研究開発機構, 共同), Takeshi Tsuji(Department of Earth Resources Engineering, Kyushu University), Chairperson:Toki Tomohiro, Tsuji Takeshi