convener:Gen Shimoda(Geological Survey of Japan, AIST), Katsuhiko Suzuki(Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology), Katsuyuki Yamashita(岡山大学大学院自然科学研究科, 共同), Akira Ishikawa(Department of Earth Science and Astronomy, The University of Tokyo), Chairperson:Wakaki Shigeyuki(JAMSTEC), Yamashita Katsuyuki(岡山大学), Suzuki Katsuhiko(JAMSTEC)