古平川

古平川 is 4 km long, and has a stream level of 2.

Map of 古平川

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古平川 flows into 奈女沢川 , which it joins at N 36° 44′ 31″, E 138° 59′ 18″ at OSM node n759421667, and there 13 km of total upstream flows in.

古平川 has 3 tributaries.

(unnamed), which joins it at N 36° 44′ 24″, E 139° 0′ 22″ at OSM node n759307079, and 4 km of total upstream flows in.

才保ノ沢, which joins it at N 36° 44′ 24″, E 138° 59′ 25″ at OSM node n760073110, and 1 km of total upstream flows in.

小野久保沢, which joins it at N 36° 44′ 24″, E 138° 59′ 35″ at OSM node n759544761, and 313 m of total upstream flows in.