古部川

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古部川 flows into 男川 , which it joins at N 34° 56′ 16″, E 137° 15′ 53″ at OSM node n727090449, and there 121 km of total upstream flows in. load it's distributaries

古部川 has 1 tributaries.

• (unnamed), which joins it at N 34° 57′ 16″, E 137° 17′ 19″ at OSM node n727018980, and 9 m of total upstream flows in.
load it's tributaries