(unnamed)

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(unnamed) flows into 日原川 , which it joins at N 35° 48′ 58″, E 139° 5′ 26″ at OSM node n701738262, and there 132 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 安寺沢, which joins it at N 35° 49′ 14″, E 139° 5′ 38″ at OSM node n701848744, and 2 km of total upstream flows in.
load it's tributaries