[1] Tokyo Inst Technol, Dept Mech Control & Syst Engn, Megro Ku, Tokyo 1528552, Japan
[2] RIKEN, Inst Phys & Chem Res, Biomimet Control Res Ctr, Moriyama Ku, Nagoya, Aichi 4630003, Japan
[3] Tokyo Denki Univ, Sch Sci & Technol Future Life, Dept Robot & Mechatron, Tiyoda Ku, Tokyo 1018457, Japan
[4] Natl Inst Adv Ind Sci & Technol, Res Inst Cell Engn, Osaka 5638577, Japan