The is a river located in

Gunma Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 (1 October 2019) and has a geographic area of 6,362 km2 (2,456 sq mi). Gunma Prefecture borders Niigata Prefecture and Fukushima ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. It is a branch of the

Tone River The is a river in the Kantō region of Japan. It is in length (the second longest in Japan after the Shinano) and has a drainage area of (the largest in Japan). It is nicknamed Bandō Tarō (); ''Bandō'' is an obsolete alias of the Kantō ...

and the government of Japan classifies it as a Class 1 river. It generally flows in a south-easterly direction. Karasu means "black water" in many

Turkic languages The Turkic languages are a language family of over 35 documented languages, spoken by the Turkic peoples of Eurasia from Eastern Europe and Southern Europe to Central Asia, East Asia, North Asia (Siberia), and Western Asia. The Turkic languag ...

River communities

The river passes through or forms the boundary of the following communities: ;Gunma Prefecture: : Takasaki, Fujioka,

Tamamura is a town located in Gunma Prefecture, Japan. , the town had an estimated population of 36,367 in 15685 households, and a population density of 1440 persons per km². The total area of the town is . Geography Tamamura is located in southern Gun ...

;

Nagano Prefecture is a landlocked prefecture of Japan located in the Chūbu region of Honshū. Nagano Prefecture has a population of 2,052,493 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the ...

: : Saku ;

Saitama Prefecture is a landlocked prefecture of Japan located in the Kantō region of Honshu. Saitama Prefecture has a population of 7,338,536 (1 January 2020) and has a geographic area of 3,797 km2 (1,466 sq mi). Saitama Prefecture borders Tochigi Prefecture ...

: : Kamisato, Honjō

Scenic areas

The river runs through the Karasugawa Ravine in Takasaki, which has hiking trails for visitors to access the river.Karasugawa Ravine
. Takasaki City. Accessed October 24, 2010.

References

Rivers of Gunma Prefecture Rivers of Nagano Prefecture Rivers of Saitama Prefecture Rivers of Japan {{Japan-river-stub