大曲川

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大曲川 flows into 観音平川 , which it joins at N 36° 10′ 11″, E 138° 25′ 46″ at OSM node n747916732, and there 13 km of total upstream flows in. load it's distributaries

大曲川 has 1 tributaries.

• (unnamed), which joins it at N 36° 7′ 52″, E 138° 21′ 50″ at OSM node n748422690, and 539 m of total upstream flows in.
load it's tributaries