1. UNIVERSITY OF TOKYO, Graduate School of Engineering(7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan)
2. KAGOSHIMA PREFECTURAL INSTITUTE OF INDUSTRIAL TECHNOLOGY(1445-1, Oda, Hayato-cho, Kirishima-shi, Kagoshima 899-5105, Japan)
3. PRINCIPLE CO., LTD.(1-17-8, Kamoike, Kagoshima-shi, Kagoshima 890-0063, Japan)