1. Mechanical Engineering Program, Hiroshima University, Higashihiroshima, Japan
2. Department of Psychology, Keio University, Minato-ku, Japan
3. Advanced Research Center for Human Sciences, Waseda University, Tokorozawa, Japan
4. Department of Neurology, Tokyo Women’s Medical University, Shinjuku-ku, Japan
5. Department of System Design Engineering, Keio University, Yokohama, Japan