山内川

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山内川 flows into 北上川 , which it joins at N 39° 5′ 8″, E 141° 11′ 16″ at OSM node n753343099, and there 2,556 km of total upstream flows in. load it's distributaries

山内川 has 1 tributaries.

• (unnamed), which joins it at N 39° 4′ 55″, E 141° 12′ 26″ at OSM node n754515955, and 4 km of total upstream flows in.
load it's tributaries