大洞川

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大洞川 flows into 定林寺川 , which it joins at N 35° 21′ 56″, E 137° 11′ 48″ at OSM node n725948757, and there 9 km of total upstream flows in. load it's distributaries

大洞川 has 1 tributaries.

• (unnamed), which joins it at N 35° 22′ 30″, E 137° 12′ 22″ at OSM node n4249339907, and 1 km of total upstream flows in.
load it's tributaries