Karasu River (Gunma)
| The Karasu River (烏川, Karasu-gawa) is a river located in Gunma Prefecture, Japan. It is a branch of the Tone River and the government of Japan classifies it as a Class 1 river. It generally flows in a south-easterly direction. The river passes through or forms the boundary of the following communities: | ||||||
| Source： | ||||||
| Mouth： | ||||||
| Length： 61.8 km (38.4 mi) | ||||||
| Basin size： 470 km2 (180 sq mi) | ||||||
 |