〇Takayuki Fujii¹, Muneyoshi Takahashi^1,2, Shinsuke Shimojo^3,4, Tetsuya Matsuda¹ (1.Tamagawa University Brain Science Institute, Tokyo, Japan, 2.Department of Management Science, College of Engineering, Tamagawa University, Tokyo, Japan., 3.Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA., 4.Computation and Neural Systems, California Institute of Technology, Pasadena, CA, USA.)