(unnamed)

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

Map of (unnamed)

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(unnamed) flows into 利根川 , which it joins at N 36° 36′ 30″, E 139° 2′ 37″ at OSM node n759335256, and there 1,561 km of total upstream flows in.

(unnamed) has 1 tributaries.

藤坂沢, which joins it at N 36° 36′ 38″, E 139° 2′ 46″ at OSM node n759680800, and 2 km of total upstream flows in.