Karasu River (Gunma)

Karasu River
The Karasu River flowing through Takasaki
Native name	烏川
Country	Japan
Physical characteristics
Main source	Hanamagari Mountain (Takasaki)
River mouth	Tone River in Honjō, Saitama
Length	61.8 km (38.4 mi)
Basin features
Basin size	470 km2 (180 sq mi)

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:

The river runs through the Karasugawa Ravine in Takasaki, which has hiking trails for visitors to access the river.