井原川

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井原川 flows into 九塚川 , which it joins at N 35° 6′ 33″, E 133° 17′ 29″ at OSM node n749304174, and there 18 km of total upstream flows in. load it's distributaries

井原川 has 1 tributaries.

• 大谷川, which joins it at N 35° 6′ 39″, E 133° 16′ 50″ at OSM node n749155586, and 5 km of total upstream flows in.
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