洞谷

洞谷 is 8 km long, and has a stream level of 2.

Map of 洞谷

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洞谷 flows into 宮川 , which it joins at N 36° 23′ 33″, E 137° 10′ 57″ at OSM node n726318477, and there 973 km of total upstream flows in.

洞谷 has 3 tributaries.

(unnamed), which joins it at N 36° 22′ 51″, E 137° 14′ 1″ at OSM node n726451379, and 2 km of total upstream flows in.

土谷, which joins it at N 36° 23′ 54″, E 137° 11′ 48″ at OSM node n726275233, and 1 km of total upstream flows in.

(unnamed), which joins it at N 36° 23′ 6″, E 137° 13′ 40″ at OSM node n725953020, and 963 m of total upstream flows in.