1. TOKYO UNIVERSITY OF SCIENCE, Faculty of Science and Technology, Department of Civil Engineering(2641, Yamazaki, Noda-shi, Chiba 278-8510, Japan)
2. EAST NIPPON EXPRESSWAY COMPANY LIMITED, Utsunomiya Operation Office(24-2, Moro, Kanuma-shi, Tochigi 322-0026, Japan)
3. TOKYO METROPOLITAN GOVERNMENT, Bureau of Sewerage(2-6-2, Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan)