外川

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外川 flows into 都幾川 , which it joins at N 35° 58′ 55″, E 139° 11′ 57″ at OSM node n1047510504, and there 14 km of total upstream flows in. load it's distributaries

外川 has 2 tributaries.

• (unnamed), which joins it at N 35° 58′ 39″, E 139° 11′ 33″ at OSM node n1048309421, and 3 km of total upstream flows in.
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• 舟の沢, which joins it at N 35° 58′ 30″, E 139° 11′ 36″ at OSM node n1047302513, and 1 km of total upstream flows in.
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