| 1952 | Established as "Waterpower research association" |
| 1960 | Established as an incorporated association by the government(Ministry of economy and international trade) |
| 1977 | Name of association was changed into "Japan electric power civil Engineering association" |
| Indivisual members | 3,225 | Civil engineers in Electoric Power Development. |
| Cooperation member | 219 | Electric Power Companies and Corpolations, and their allied Co., Construction Co. Consulting Co. Institutes. |
| Supporting member | 101 | Reading organizations of regular publications, etc. |
JEPOC is administrated by an annual general meeting and board of trustees Consisting 28 members elected above mentioned.
