11:45 AM - 12:00 PM
*Satoru KOJIMA1, Ryota NIWA1, Heitaro KANEDA2, Akiko IKEDA3, Toshio NAKAMURA3, Tomoyuki OHTANI1 (1.Department of Civil Engineering, Gifu University, 2.Department of Earth Sciences, Chiba University, 3.Center for Chronological Research, Nagoya University)