上三川

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上三川 flows into 渋利川 , which it joins at N 32° 26′ 8″, E 130° 38′ 5″ at OSM node n744562186, and there 4 km of total upstream flows in. load it's distributaries

上三川 has 2 tributaries.

• (unnamed), which joins it at N 32° 26′ 7″, E 130° 38′ 0″ at OSM node n744496531, and 475 m of total upstream flows in.
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• (unnamed), which joins it at N 32° 26′ 29″, E 130° 37′ 36″ at OSM node n744711521, and 337 m of total upstream flows in.
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