1. Graduate School of Information Science and Engineering, Ritsumeikan University, Shiga, Japan
2. Ritsumeikan Center for Game Studies, Ritsumeikan University, Kyoto, Japan
3. Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
4. College of Information Science and Engineering, Ritsumeikan University, Shiga, Japan
5. School of Information Technology, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand
6. Department of Rehabilitation Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand