(unnamed)

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(unnamed) flows into 蛇ヶ洞川 , which it joins at N 35° 16′ 9″, E 137° 9′ 30″ at OSM node n727057085, and there 3 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 龍ヶ洞川, which joins it at N 35° 16′ 14″, E 137° 9′ 37″ at OSM node n727072439, and 1 km of total upstream flows in.
load it's tributaries