1. Research Institute of Innovative Technology for the Earth, 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto 619-0292, Japan
2. Honda R&D Co., Ltd., 1-4-1 Chuo Wako-shi, Saitama 351-0193, Japan
3. Laboratory of Biomass Conversion, Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan