内山川

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内山川 flows into 鉄山川 , which it joins at N 32° 3′ 20″, E 130° 53′ 41″ at OSM node n742928716, and there 27 km of total upstream flows in. load it's distributaries

内山川 has 2 tributaries.

• (unnamed) , which joins it at the following points: 4 km of total upstream flows in at N 32° 4′ 34″, E 130° 54′ 1″ at OSM node n742727147 3 km of total upstream flows in at N 32° 4′ 34″, E 130° 54′ 1″ at OSM node n742727147
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• (unnamed), which joins it at N 32° 4′ 10″, E 130° 53′ 48″ at OSM node n742756030, and 3 km of total upstream flows in.
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