古谷川

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古谷川 flows into 丹野川 , which it joins at N 34° 42′ 24″, E 138° 7′ 14″ at OSM node n735384927, and there 7 km of total upstream flows in. load it's distributaries

古谷川 has 2 tributaries.

• 内谷川, which joins it at N 34° 42′ 30″, E 138° 7′ 36″ at OSM node n735300634, and 574 m of total upstream flows in.
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• (unnamed), which joins it at N 34° 42′ 44″, E 138° 8′ 16″ at OSM node n735239898, and 78 m of total upstream flows in.
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