(unnamed)

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(unnamed) flows into 大落古利根川 , which it joins at N 35° 54′ 26″, E 139° 50′ 9″ at OSM node n1047451189, and there 98 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 八間堀悪水路, which joins it at N 35° 54′ 27″, E 139° 50′ 9″ at OSM node n1047289128, and 16 km of total upstream flows in.
load it's tributaries