| Niikappu River (Nikappu-gawa) | |
| 新冠川 | |
| River | |
| Country | Japan |
|---|---|
| State | Hokkaidō |
| Region | Hidaka |
| District | Niikappu |
| Municipality | Niikappu |
| Source | Mount Poroshiri |
| - location | Niikappu, Hokkaidō, Japan |
| - elevation | 2,052.4 m (6,734 ft) |
| - coordinates | |
| Mouth | Pacific Ocean |
| - location | Niikappu, Hokkaidō, Japan |
| - elevation | 0 m (0 ft) |
| - coordinates | |
| Length | 80 km (50 mi) |
Niikappu River (新冠川 Niikappu-gawa) is a river in Hokkaidō, Japan.
The Niikappu River flows south to southwest from Mount Poroshiri[1] in the Hidaka Mountains. The river flows through four dams, including Niikappu Dam and Okuniikappu Dam. Both dams are owned by the Hokkaido Electric Power Company, Inc.[2] The dams form Lake Niikappu and Lake Poroshiri, respectively. After 80 kilometres (50 mi)[3], the river empties into the Pacific Ocean.[4]