*Keitaro YAMADA¹, Takeshi NAKAGAWA², Megumi SAITO-KATO³, Richard STAFF⁴, Ikuko KITABA², Junko KITAGAWA⁵, Tsuyoshi HARAGUCHI⁶, Victoria SMITH⁴, Danielle MCLEAN⁴, Katsuya GOTANDA⁷, Paul ALBERT⁸, Masayuki HYODO⁹, Yoshiaki SUZUKI¹⁰, Hayato MATSUSHITA¹¹, Akiteru YAMASAKI⁶, Keiji TAKEMURA¹ (1.Graduate School of Science, Kyoto University, 2.Research Centre for Palaeoclimatology, Ritsumeikan University, 3.Department of Geology and Paleontology, National Museum of Nature and Science, 4.University of Oxford, 5.Fukui Prefectural Satoyama-Satoumi Research Institute, 6.Department of Geosciences,Graduate School of Science,Osaka City University, 7.Faculty of Polycy Informatics, Chiba University of Commerce, 8.Swansea University, 9.Research Center for Inland Seas, Kobe University, 10.Department of Earth and Planetary Science, Graduate school of Science, The University of Tokyo, 11.Department of Earth and Planetary Science, Kobe University)