古塚川

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古塚川 flows into 横山川 , which it joins at N 33° 16′ 23″, E 130° 40′ 23″ at OSM node n745475655, and there 16 km of total upstream flows in. load it's distributaries

古塚川 has 1 tributaries.

• 納又川, which joins it at N 33° 16′ 26″, E 130° 40′ 25″ at OSM node n745326297, and 7 km of total upstream flows in.
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