*Masahiro Akiba¹, Makoto Taguchi², Tetsuya Fukuhara², Takeshi Imamura³, Toru Kouyama⁴, Takao M. Sato⁵ (1.Rikkyo graduate School, 2.Rikkyo University, 3.The University of Tokyo, 4.National Institute of Advanced Industrial Science and Technology, 5.Hokkaido Information University)