後川

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後川 flows into 北上川 , which it joins at N 39° 23′ 27″, E 141° 7′ 45″ at OSM node n753680208, and there 3,169 km of total upstream flows in. load it's distributaries

後川 has 1 tributaries.

• (unnamed), which joins it at N 39° 23′ 41″, E 141° 6′ 26″ at OSM node n754407440, and 3 km of total upstream flows in.
load it's tributaries