*Kosuke Matsumoto², Chiyuki Narama¹, Honami Watanabe³, Katsuhisa Kawashima¹, Hiroshi YAGI⁴, Daisuke Higaki⁵, Akihiko Wakai⁶ (1.Niigata University, 2.Graduate school of Niigata University, 3.RESTEC, 4.Yamagata University, 5.Hirosaki University, 6.Gunma University)