*Keitaro Yamada¹, Takayuki Omori², Ikuko Kitaba³, Yamasaki Akiteru⁴, Takeshi Nakagawa³ (1.Research Organization of Science and Technology, Ritsumeikan University, 2.The University Museum, The University of Tokyo, 3.Research Centre for Palaeoclimatology, Ritsumeikan University, 4.Fukui Prefectural Satoyama-Satoumi Reserch Institute)

*Yamasaki Akiteru¹, Keitaro Yamada², Takayuki Omori³, Ikuko Kitaba², Takeshi Nakagawa² (1.Fukui Prefectural Satoyama-Satoumi Reserch Institute, 2.Research Centre for Palaeoclimatology, Ritsumeikan University, 3.The University museum, The University of Tokyo)