大洞川

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大洞川 flows into 川浦川 , which it joins at N 35° 29′ 40″, E 136° 59′ 47″ at OSM node n726355180, and there 35 km of total upstream flows in. load it's distributaries

大洞川 has 1 tributaries.

• (unnamed), which joins it at N 35° 30′ 40″, E 137° 0′ 20″ at OSM node n726186784, and 478 m of total upstream flows in.
load it's tributaries