(unnamed)

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(unnamed) flows into 杉倉川 , which it joins at N 40° 16′ 21″, E 141° 3′ 45″ at OSM node n6904417337, and there 32 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 杉倉川, which joins it at N 40° 16′ 13″, E 141° 3′ 21″ at OSM node n6904417338, and 27 km of total upstream flows in.
load it's tributaries
• 鶏頭沢, which joins it at N 40° 16′ 13″, E 141° 3′ 21″ at OSM node n6904417338, and 3 km of total upstream flows in.
load it's tributaries