河口川

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河口川 flows into 蛇籠川 , which it joins at N 32° 9′ 34″, E 131° 11′ 35″ at OSM node n742918931, and there 10 km of total upstream flows in. load it's distributaries

河口川 has 2 tributaries.

• (unnamed), which joins it at N 32° 10′ 22″, E 131° 9′ 9″ at OSM node n742933491, and 423 m of total upstream flows in.
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• (unnamed), which joins it at N 32° 10′ 33″, E 131° 9′ 25″ at OSM node n743177962, and 296 m of total upstream flows in.
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