西洞川

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西洞川 flows into 秋神川 , which it joins at N 36° 1′ 6″, E 137° 23′ 25″ at OSM node n726241341, and there 61 km of total upstream flows in. load it's distributaries

西洞川 has 4 tributaries.

• (unnamed), which joins it at N 36° 0′ 37″, E 137° 22′ 23″ at OSM node n726139245, and 3 km of total upstream flows in.
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• (unnamed), which joins it at N 36° 0′ 45″, E 137° 22′ 38″ at OSM node n726055438, and 992 m of total upstream flows in.
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• (unnamed), which joins it at N 36° 1′ 3″, E 137° 23′ 7″ at OSM node n726164840, and 856 m of total upstream flows in.
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• (unnamed), which joins it at N 35° 59′ 0″, E 137° 21′ 41″ at OSM node n726175331, and 358 m of total upstream flows in.
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