長川

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長川 flows into 赤川 , which it joins at N 39° 57′ 43″, E 141° 3′ 51″ at OSM node n753982470, and there 79 km of total upstream flows in. load it's distributaries

長川 has 6 tributaries.

• 外芳名沢, which joins it at N 39° 57′ 59″, E 141° 2′ 43″ at OSM node n754100253, and 7 km of total upstream flows in.
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• 小松尾沢川, which joins it at N 39° 58′ 24″, E 141° 2′ 1″ at OSM node n754502904, and 5 km of total upstream flows in.
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• 竜ヶ森沢, which joins it at N 39° 59′ 57″, E 140° 59′ 44″ at OSM node n753561868, and 3 km of total upstream flows in.
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• 堤沢, which joins it at N 39° 58′ 21″, E 141° 2′ 4″ at OSM node n754545635, and 2 km of total upstream flows in.
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• 栗木沢, which joins it at N 39° 59′ 42″, E 141° 0′ 2″ at OSM node n753724282, and 2 km of total upstream flows in.
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• 栗日影, which joins it at N 39° 59′ 16″, E 141° 0′ 59″ at OSM node n754137946, and 1 km of total upstream flows in.
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