西山川

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西山川 flows into 大野川 , which it joins at N 34° 38′ 39″, E 137° 13′ 9″ at OSM node n727033248, and there 6 km of total upstream flows in. load it's distributaries

西山川 has 1 tributaries.

• (unnamed), which joins it at N 34° 39′ 21″, E 137° 13′ 41″ at OSM node n727223794, and 3 km of total upstream flows in.
load it's tributaries