(unnamed)

(unnamed) is 1 km long, and has a stream level of 2.

Map of (unnamed)

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(unnamed) flows into 幾春別川 , which it joins at N 43° 11′ 41″, E 142° 3′ 48″ at OSM node n1465279030, and there 29 km of total upstream flows in.

(unnamed) has 2 tributaries.

奥左股沢, which joins it at N 43° 11′ 21″, E 142° 4′ 47″ at OSM node n1465278220, and 8 km of total upstream flows in.

夕張越沢, which joins it at N 43° 11′ 21″, E 142° 4′ 47″ at OSM node n1465278220, and 3 km of total upstream flows in.