*Masaaki Kikuchi¹, Ichiro Yasuda¹, Yasutaka Goto¹, Takahiro Tanaka¹, Ken-Ichi Amaike², Ken Yamaki², Fabian Wolk³, Brett Prairie³ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.The Tsurumi Seiki Co., Ltd, 3.Rockland Scientific International Inc.)