赤井川

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赤井川 flows into 折戸川 , which it joins at N 42° 0′ 6″, E 140° 38′ 52″ at OSM node n1452596195, and there 72 km of total upstream flows in. load it's distributaries

赤井川 has 3 tributaries.

• 精進川, which joins it at N 42° 1′ 55″, E 140° 37′ 18″ at OSM node n1452618353, and 12 km of total upstream flows in.
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• 板小屋沢川, which joins it at N 42° 1′ 29″, E 140° 37′ 1″ at OSM node n1452613085, and 8 km of total upstream flows in.
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• ババ沼川, which joins it at N 42° 2′ 35″, E 140° 36′ 52″ at OSM node n1452625949, and 2 km of total upstream flows in.
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