1. Division of Environmental Chemistry, National Institute of Health Sciences
2. Tokyo Metropolitan Institute of Public Health
3. Waterworks Bureau, City of Hiroshima
4. Hachinohe Regional Water Supply Authority
5. Chiba Prefectural Waterworks Bureau
6. Waterworks Bureau, City of Fukuyama
7. Water Examination Laboratory of Osaka Municipal Waterworks Bureau
8. Bureau of Waterworks, Tokyo Metropolitan Government
9. Mie Prefecture Environmental Conservation Agency
10. Gifu Research Center for Pubric Health
11. Chiba Pharmaceutical Association
12. Shimadzu Corporation
13. Agilent Technologies Japan, Ltd.
14. GL Sciences Inc.
15. Nihon Waters K.K.