宇洞沢

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宇洞沢 flows into 関ノ沢川 , which it joins at N 35° 13′ 10″, E 138° 11′ 22″ at OSM node n735575424, and there 15 km of total upstream flows in. load it's distributaries

宇洞沢 has 1 tributaries.

• (unnamed), which joins it at N 35° 13′ 29″, E 138° 10′ 56″ at OSM node n735277115, and 1 km of total upstream flows in.
load it's tributaries