| Government/ National Institute |
| ･ Ministry of Health, Labor and Welfare |
| ･ Ministry of Land, Infrastructure, transport and Tourism |
| ･ Ministry of Environment |
| ･ Ministry of Internal Affairs and Communications |
| ･ Japan Water Agency |
| ･ National Institute of Public Health |
| ･ O & M Network |
| ･ National Institute of Environmental Studies |
| Association/ Academic Society |
| ･ Japan Sewage Works Association |
| ･ Japan Society on Water Environment |
| ･ Japan Water Research Center |
| International Water Association |
| ･ IWA |
| ･ IWA Japan National Committee |
| ･ ISO/TC224 |
