(unnamed)

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(unnamed) flows into 神水川 , which it joins at N 43° 48′ 48″, E 142° 29′ 15″ at OSM node n1460159582, and there 31 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 百間堀川, which joins it at N 43° 53′ 41″, E 142° 32′ 24″ at OSM node n1460230900, and 6 km of total upstream flows in.
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• 学園別川, which joins it at N 43° 51′ 55″, E 142° 30′ 57″ at OSM node n1460215384, and 3 km of total upstream flows in.
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