| Yasu River | |
|---|---|
 | |
 | |
| Native name | 野洲川 (Japanese) |
| Location | |
| Country | Japan |
| Physical characteristics | |
| Source | |
| • location | Suzuka Mountains |
| Mouth | |
• location | Lake Biwa |
| Length | 65.25 km (40.54 mi) |
| Basin size | 387 km2 (149 sq mi) |
| Basin features | |
| River system | Yodo River |
The Yasu River (野洲川, Yasu-gawa) is located in Shiga Prefecture, Japan; it is the largest river to flow into Lake Biwa.