[1] Keio Univ, Fac Sci & Technol, Dept Phys, Yokohama, Kanagawa 2238522, Japan
[2] Teikyo Univ, Biotechnol Res Ctr 3F, Genet Programming Team 13, CREST, Nogawa, Kawasaki 2160001, Japan
[3] Waseda Univ, Sch Sci & Engn, Dept Phys, Tokyo 1698555, Japan
[4] Tokyo Inst Technol, Resources Utilizat Res Lab, Yokohama 2268503, Kanagawa, Japan