*Atsushi MIYASHITA¹, Hiroyasu MURAKAMI², Wataru FUJITA¹, Masakazu RIKITA³, Takashi ICHIKAWA⁴, Tomohiko SEKIYA⁵ (1.Seikei University, 2.Waseda University, 3.Shimonita Nature School, 4.Keyaki Special Support School, 5.Shimonita Geopark)