(unnamed)

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(unnamed) flows into 馬淵川 , which it joins at N 40° 13′ 9″, E 141° 17′ 52″ at OSM node n4290461750, and there 511 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 春日川, which joins it at N 40° 13′ 12″, E 141° 17′ 56″ at OSM node n4290461726, and 803 m of total upstream flows in.
load it's tributaries