古城谷川

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古城谷川 flows into ほたる川 , which it joins at N 34° 3′ 26″, E 134° 14′ 37″ at OSM node n756393412, and there 9 km of total upstream flows in. load it's distributaries

古城谷川 has 1 tributaries.

• 坂田谷川, which joins it at N 34° 3′ 14″, E 134° 14′ 43″ at OSM node n756257056, and 445 m of total upstream flows in.
load it's tributaries