コタン開拓沢川

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コタン開拓沢川 flows into コタン沢川 , which it joins at N 43° 59′ 58″, E 143° 24′ 56″ at OSM node n1476264485, and there 11 km of total upstream flows in. load it's distributaries

コタン開拓沢川 has 2 tributaries.

• (unnamed), which joins it at N 43° 59′ 40″, E 143° 24′ 57″ at OSM node n1476260675, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 43° 59′ 38″, E 143° 24′ 57″ at OSM node n1476259955, and 844 m of total upstream flows in.
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