(unnamed)

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(unnamed) flows into 荒川 , which it joins at N 36° 7′ 25″, E 139° 6′ 54″ at OSM node n5226117512, and there 814 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 砂吹沢, which joins it at N 36° 7′ 27″, E 139° 6′ 32″ at OSM node n1048455583, and 3 km of total upstream flows in.
load it's tributaries
• 大日影沢, which joins it at N 36° 7′ 27″, E 139° 6′ 32″ at OSM node n1048455583, and 2 km of total upstream flows in.
load it's tributaries