古市川

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古市川 flows into 天塩川 , which it joins at N 44° 46′ 30″, E 142° 3′ 57″ at OSM node n1458543120, and there 4,383 km of total upstream flows in. load it's distributaries

古市川 has 1 tributaries.

• (unnamed), which joins it at N 44° 45′ 51″, E 142° 4′ 22″ at OSM node n1458541628, and 1 km of total upstream flows in.
load it's tributaries