外野沢

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外野沢 flows into 一方井川 , which it joins at N 39° 58′ 6″, E 141° 11′ 5″ at OSM node n754083888, and there 57 km of total upstream flows in. load it's distributaries

外野沢 has 1 tributaries.

• (unnamed), which joins it at N 39° 58′ 1″, E 141° 8′ 44″ at OSM node n753368992, and 3 km of total upstream flows in.
load it's tributaries