2:45 PM - 3:00 PM
*Yoko Ohtomo1, Takenori Kato2, Tsubasa Otake1, Takeshi Kakegawa3 (1.Faculty of Engineering, Hokkaido University, 2.Division for Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University, 3.Graduate School of Science and Faculty of Science, Tohoku University)