(unnamed)

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(unnamed) flows into 小山川 , which it joins at N 34° 48′ 28″, E 137° 10′ 53″ at OSM node n12060518790, and there 666 m of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 秋葉川, which joins it at N 34° 48′ 29″, E 137° 10′ 52″ at OSM node n12060518827, and 348 m of total upstream flows in.
load it's tributaries