岩井谷

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岩井谷 flows into 大八賀川 , which it joins at N 36° 7′ 46″, E 137° 21′ 6″ at OSM node n726197103, and there 10 km of total upstream flows in. load it's distributaries

岩井谷 has 1 tributaries.

• (unnamed), which joins it at N 36° 8′ 10″, E 137° 24′ 16″ at OSM node n726220352, and 380 m of total upstream flows in.
load it's tributaries