由仁川

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由仁川 flows into 夕張川 , which it joins at N 43° 1′ 29″, E 141° 47′ 2″ at OSM node n1463357763, and there 906 km of total upstream flows in. load it's distributaries

由仁川 has 2 tributaries.

• 馬来内川, which joins it at N 42° 57′ 20″, E 141° 48′ 9″ at OSM node n1463317921, and 8 km of total upstream flows in.
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• 古山川, which joins it at N 42° 58′ 39″, E 141° 48′ 9″ at OSM node n1463331738, and 6 km of total upstream flows in.
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