(unnamed)

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(unnamed) flows into 乙川 , which it joins at N 34° 57′ 29″, E 137° 14′ 50″ at OSM node n727131330, and there 65 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 内海戸川, which joins it at N 34° 57′ 29″, E 137° 14′ 34″ at OSM node n727190175, and 551 m of total upstream flows in.
load it's tributaries