古川

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古川 flows into 目名川 , which it joins at N 41° 48′ 17″, E 140° 6′ 49″ at OSM node n1452388346, and there 35 km of total upstream flows in. load it's distributaries

古川 has 1 tributaries.

• (unnamed), which joins it at N 41° 47′ 34″, E 140° 8′ 38″ at OSM node n1452377073, and 1 km of total upstream flows in.
load it's tributaries