西洞谷

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西洞谷 flows into 小駄良川 , which it joins at N 35° 46′ 43″, E 136° 57′ 24″ at OSM node n725949128, and there 24 km of total upstream flows in. load it's distributaries

西洞谷 has 2 tributaries.

• 宮ヶ洞, which joins it at N 35° 46′ 46″, E 136° 57′ 24″ at OSM node n726028834, and 1 km of total upstream flows in.
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• 次郎左谷, which joins it at N 35° 47′ 0″, E 136° 57′ 31″ at OSM node n726066980, and 494 m of total upstream flows in.
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