5:15 PM - 6:30 PM
*Kazutaka Mannen1, George Kikugawa1, Yasushi Daita1, Tamami YAMAGUCHI2, Takeshi Ohba3, Muga Yaguchi3 (1.Hot Springs Research Institute of Kanagawa Prefecture, 2.Hakone Geomuseum, 3.Department of Chemistry, School of Science, Tokai University)