As of March 1, 2015
| Name of Plant | Company | Installed Capacity (MW) | Type | |
|---|---|---|---|---|
| 1 | Daini Numazawa | Tohoku | 460 | Pumped Storage |
| 2 | Shin Takasegawa | Tokyo | 1,280 | Pumped Storage |
| 3 | Tamahara | Tokyo | 1,200 | Pumped Storage |
| 4 | Kazunogawa | Tokyo | 1,200 | Pumped Storage |
| 5 | Imaichi | Tokyo | 1,050 | Pumped Storage |
| 6 | Kannagawa | Tokyo | 940 | Pumped Storage |
| 7 | Shiobara | Tokyo | 900 | Pumped Storage |
| 8 | Azumi | Tokyo | 623 | Pumped Storage |
| 9 | Okumino | Chubu | 1,500 | Pumped Storage |
| 10 | Okuyahagi Daini | Chubu | 780 | Pumped Storage |
| 11 | Okutataragi | Kansai | 1,932 | Pumped Storage |
| 12 | Okawachi | Kansai | 1,280 | Pumped Storage |
| 13 | Okuyoshino | Kansai | 1,206 | Pumped Storage |
| 14 | Kisenyama | Kansai | 466 | Pumped Storage |
| 15 | Matanogawa | Chugoku | 1,200 | Pumped Storage |
| 16 | Nabara | Chugoku | 620 | Pumped Storage |
| 17 | Hongawa | Shikoku | 615 | Pumped Storage |
| 18 | Omarugawa | Kyusyu | 1,200 | Pumped Storage |
| 19 | Tenzan | Kyushu | 600 | Pumped Storage |
| 20 | Ohira | Kyushu | 500 | Pumped Storage |
| 21 | Shin Toyone | J-Power | 1,125 | Pumped Storage |
| 22 | Shimogo | J-Power | 1,000 | Pumped Storage |
| 23 | Okukiyotsu | J-Power | 1,000 | Pumped Storage |
| 24 | Numappara | J-Power | 675 | Pumped Storage |
| 25 | Okukiyotsu Daini | J-Power | 600 | Pumped Storage |
| 26 | Okutadami | J-Power | 560 | |
| 27 | Tagokura | J-Power | 400 |
Note: EPDC=Electric Power Development Co., LTD.
