Implementation Structure
The Japanese Ministry of the Environment draws up the overall JECS plan. The National Institute for Environmental Studies plays a central role as the National Center that coordinates and cooperates with 15 Regional Centers. Regional Centers are composed of universities and medical centers. The National Center for Child Health and Development supports this study from the medical aspect as the Medical Support Center.
To advance the JECS project, networking and building partnerships with the following organizations is critical.
- Ministry of Health, Labor and Welfare
- Ministry of Education, Culture, Sports, Science and Technology
- International Organizations (WHO, etc.)
- Foreign national cohort studies

Regional Centers
The 15 Regional Centers located across Japan.

| No. | Regional Centers | Universities (collaborating research institutes) |
|---|---|---|
| 1 | Hokkaido | Hokkaido University, Sapporo Medical University, Asahikawa Medical University, The Japanese Red Cross Hokkaido College of Nursing. |
| 2 | Miyagi | Tohoku University |
| 3 | Fukushima | Fukushima Medical University |
| 4 | Chiba | Chiba University |
| 5 | Kanagawa | Yokohama City University |
| 6 | Koushin | University of Yamanashi, Shinshu University |
| 7 | Toyama | University of Toyama |
| 8 | Aichi | Nagoya City University |
| 9 | Kyoto | Kyoto University, Doshisha University |
| 10 | Osaka | Osaka University, Osaka Medical Center and Research Institute for Maternal and Child Healh |
| 11 | Hyogo | Hyogo College of Medicine |
| 12 | Tottori | Tottori University |
| 13 | Kochi | Kochi University |
| 14 | Fukuoka | University of Occupational Environmental Health (Sub Regional Center), Kyushu University (Sub Regional Center) |
| 15 | South Kyushu /Okinawa |
Kumamoto University, University of Miyazaki, University of the Ryukyus (Sub Regional Center) |