永山川

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永山川 flows into 北俣川 , which it joins at N 32° 1′ 58″, E 131° 19′ 20″ at OSM node n743151634, and there 9 km of total upstream flows in. load it's distributaries

永山川 has 2 tributaries.

• (unnamed), which joins it at N 32° 2′ 39″, E 131° 19′ 12″ at OSM node n742946408, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 32° 2′ 10″, E 131° 19′ 26″ at OSM node n742834624, and 530 m of total upstream flows in.
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