1. Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto University, Sakyo-ku, Kyoto 606-8306, Japan
2. Umeå Center for Functional Brain Imaging, S-901 87 Umeå, Sweden
3. College of Contemporary Psychology, Rikkyo University, Niiza, Saitama 352-8558, Japan
4. NTT DATA Institute of Management Consulting, Inc., Chiyoda-ku, Tokyo 102-0093, Japan
5. Graduate School of Comprehensive Human Sciences, University of Tsukuba, Bunkyo-ku, Tokyo 112-0012, Japan
6. Kokoro Research Center, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
7. Department of Human and Environmental Informatics, Kumamoto University, Chuo-ku, kumamoto 860-8555, Japan