(unnamed)

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(unnamed) flows into 大平沢 , which it joins at N 40° 10′ 27″, E 140° 53′ 25″ at OSM node n753478109, and there 2 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 権現沢, which joins it at N 40° 10′ 30″, E 140° 53′ 4″ at OSM node n754231951, and 506 m of total upstream flows in.
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• 冷水沢, which joins it at N 40° 10′ 30″, E 140° 53′ 4″ at OSM node n754231951, and 359 m of total upstream flows in.
load it's tributaries