| name | image | status | type | Area (m²) | date Commissioned | date Opened | date Start construction | Website | Height (m) | Country | continent | Maximum discharge (m³/day) | lake | Installed capacity (w) | latitude (°) | Length (m) | longitude (°) | Turbines | volume (m³) | administrative división | city | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ōmachi Dam |  | Operational | Gravity | 04/1985 | 1985 | 1972 | website | 107 | Japan | Asia | 36.5000000000 | 338 | 137.7666625977 | 1 | 766,000 | Nagano Prefecture | Ōmachi, Nagano | Map | ||||
| Amekawa Dam |  | Operational | Gravity | 30/11/1974 | 1971 | website | Japan | Asia | 36.1833343506 | 126 | 138.5500030518 | 38,000 | Nagano Prefecture | Saku, Nagano | Map | |||||||
| Kōsaka Dam |  | Operational | Embankment | 1972 | 1969 | website | Japan | Asia | 36.2500000000 | 184 | 138.5333404541 | 334,000 | Nagano Prefecture | Saku, Nagano | Map | |||||||
| Kanabara Dam |  | 1999 | website | Japan | Asia | 36.4000015259 | 138.3500061035 | Nagano Prefecture | Tōmi, Nagano | Map | ||||||||||||
| Kitayama Dam |  | website | Japan | Asia | 36.4666671753 | 138.0500030518 | Nagano Prefecture | Omi, Nagano | Map |