西山川

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西山川 flows into 大内山川 , which it joins at N 34° 20′ 11″, E 136° 24′ 24″ at OSM node n734412105, and there 134 km of total upstream flows in. load it's distributaries

西山川 has 2 tributaries.

• (unnamed), which joins it at N 34° 19′ 53″, E 136° 23′ 45″ at OSM node n734426358, and 238 m of total upstream flows in.
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• (unnamed), which joins it at N 34° 19′ 56″, E 136° 23′ 35″ at OSM node n734300260, and 191 m of total upstream flows in.
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