下ヶ洞谷

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下ヶ洞谷 flows into 馬瀬川 , which it joins at N 35° 56′ 15″, E 137° 8′ 0″ at OSM node n726030055, and there 80 km of total upstream flows in. load it's distributaries

下ヶ洞谷 has 1 tributaries.

• (unnamed), which joins it at N 35° 56′ 24″, E 137° 7′ 32″ at OSM node n726198289, and 244 m of total upstream flows in.
load it's tributaries