convener:Gen Shimoda(Geological Survey of Japan, AIST), Katsuhiko Suzuki(Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology), Katsuyuki Yamashita(Faculty of Environmental, Life, Natural Science and Technology, Okayama University), Akira Ishikawa(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Chairperson:Gen Shimoda(Geological Survey of Japan, AIST), Katsuhiko Suzuki(Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology), Akira Ishikawa(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Katsuyuki Yamashita(Faculty of Environmental, Life, Natural Science and Technology, Okayama University)