1. Advanced Technology Research Laboratories, Idemitsu Kosan Co., Ltd., 123-1 Shimokawairi, Atsugi 243-0206, Kanagawa, Japan
2. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
3. Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan