井沼川

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井沼川 flows into 五行川 , which it joins at N 36° 36′ 22″, E 140° 2′ 38″ at OSM node n759124444, and there 50 km of total upstream flows in. load it's distributaries

井沼川 has 2 tributaries.

• 冷子川, which joins it at N 36° 38′ 31″, E 140° 2′ 17″ at OSM node n759193297, and 12 km of total upstream flows in.
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• 大沼川, which joins it at N 36° 37′ 29″, E 140° 2′ 47″ at OSM node n758694159, and 11 km of total upstream flows in.
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