古川谷

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古川谷 flows into 城川 , which it joins at N 33° 35′ 51″, E 135° 33′ 46″ at OSM node n975006664, and there 4 km of total upstream flows in. load it's distributaries

古川谷 has 2 tributaries.

• (unnamed), which joins it at N 33° 35′ 51″, E 135° 33′ 52″ at OSM node n974757893, and 499 m of total upstream flows in.
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• (unnamed), which joins it at N 33° 36′ 3″, E 135° 34′ 16″ at OSM node n974813900, and 474 m of total upstream flows in.
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