関山川

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関山川 flows into 里根川 , which it joins at N 36° 50′ 27″, E 140° 46′ 51″ at OSM node n758388082, and there 41 km of total upstream flows in. load it's distributaries

関山川 has 1 tributaries.

• (unnamed), which joins it at N 36° 51′ 8″, E 140° 46′ 41″ at OSM node n758256114, and 846 m of total upstream flows in.
load it's tributaries