北洞川

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北洞川 flows into (unnamed) , which it joins at N 36° 9′ 50″, E 137° 57′ 57″ at OSM node n748532048, and there 6 km of total upstream flows in. load it's distributaries

北洞川 has 1 tributaries.

• (unnamed), which joins it at N 36° 9′ 46″, E 137° 58′ 33″ at OSM node n747902280, and 3 km of total upstream flows in.
load it's tributaries