1. Department of Epidemiology and Prevention, National Center for Global Health and Medicine
2. Hitachi, Ltd.
3. Mitsui Chemicals, Inc.
4. Tokyo Gas Co., Ltd.
5. Azbil Corporation
6. Nippon Steel & Sumitomo Metal Corporation Kimitsu Works
7. Mitsubishi Fuso Truck and Bus Corporation
8. YAMAHA CORPORATION
9. Mizue Medical Clinic, Keihin Occupational Health Center
10. Furukawa Electric Co., Ltd.
11. Mitsubishi Plastics, Inc.
12. All Japan Labour Welfare Foundation
13. Teikyo University Graduate School of Public Health