長井川

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長井川 flows into 烏川 , which it joins at N 36° 26′ 50″, E 138° 46′ 11″ at OSM node n759653768, and there 35 km of total upstream flows in. load it's distributaries

長井川 has 4 tributaries.

• (unnamed) , which joins it at the following points: 730 m of total upstream flows in at N 36° 28′ 25″, E 138° 47′ 17″ at OSM node n759611798 3 km of total upstream flows in at N 36° 28′ 25″, E 138° 47′ 17″ at OSM node n759611798
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• (unnamed), which joins it at N 36° 27′ 24″, E 138° 46′ 38″ at OSM node n760091657, and 3 km of total upstream flows in.
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• (unnamed), which joins it at N 36° 27′ 1″, E 138° 46′ 12″ at OSM node n760127582, and 2 km of total upstream flows in.
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• 相満川, which joins it at N 36° 28′ 5″, E 138° 46′ 52″ at OSM node n759258902, and 1 km of total upstream flows in.
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