(unnamed)

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(unnamed) flows into 遠賀川 (Onga River) , which it joins at the following points: 621 km of total upstream flows in at N 33° 46′ 30″, E 130° 43′ 11″ at OSM node n745480587 619 km of total upstream flows in at N 33° 46′ 21″, E 130° 43′ 16″ at OSM node n745534198 load it's distributaries

(unnamed) has 1 tributaries.

• 居立川, which joins it at N 33° 46′ 17″, E 130° 43′ 2″ at OSM node n745383260, and 3 km of total upstream flows in.
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