(unnamed)

(unnamed) is 2 km long, and has a stream level of 3.

Map of (unnamed)

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(unnamed) flows into 笠科川 , which it joins at N 36° 51′ 3″, E 139° 14′ 6″ at OSM node n759340598, and there 51 km of total upstream flows in.

(unnamed) has 3 tributaries.

大久保沢, which joins it at N 36° 51′ 35″, E 139° 14′ 48″ at OSM node n759424276, and 2 km of total upstream flows in.

冬路沢, which joins it at N 36° 52′ 51″, E 139° 15′ 10″ at OSM node n759426271, and 2 km of total upstream flows in.

丸山沢, which joins it at N 36° 52′ 53″, E 139° 15′ 14″ at OSM node n760026014, and 1 km of total upstream flows in.