(unnamed)

(unnamed) is 3 km long, and has a stream level of 1.

Map of (unnamed)

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(unnamed) flows into 木曽川 , which it joins at N 35° 28′ 14″, E 137° 6′ 36″ at OSM node n726477326, and there 1,419 km of total upstream flows in.

(unnamed) has 3 tributaries.

西洞川, which joins it at N 35° 28′ 45″, E 137° 6′ 12″ at OSM node n725990051, and 814 m of total upstream flows in.

亀洞川, which joins it at N 35° 29′ 15″, E 137° 6′ 33″ at OSM node n726061842, and 375 m of total upstream flows in.

秀ヶ谷川, which joins it at N 35° 29′ 21″, E 137° 6′ 50″ at OSM node n726258987, and 359 m of total upstream flows in.