(unnamed)

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(unnamed) flows into 筑後川 , which it joins at N 33° 21′ 45″, E 130° 38′ 51″ at OSM node n745579262, and there 1,487 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 長田川, which joins it at N 33° 22′ 4″, E 130° 39′ 9″ at OSM node n745520369, and 825 m of total upstream flows in.
load it's tributaries