1. D. Eng., Head of Meteorological Disaster Prevention Laboratory, Railway Technical Research Institute, 2-8-38 Hikari-cho, Kokubunji-shi, Tokyo 185-8540, Japan.
2. Senior Researcher, Railway Technical Research Institute, 2-8-38 Hikari-cho, Kokubunji-shi, Tokyo 185-8540, Japan
3. Manager, West Japan Railway Co., 2-3-8 Matsunouchi, Akashi-shi 673-0016, Japan