(unnamed)

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(unnamed) flows into 小笠沢川 , which it joins at the following points: 16 km of total upstream flows in at N 34° 44′ 9″, E 137° 56′ 11″ at OSM node n735221087 24 km of total upstream flows in at N 34° 43′ 52″, E 137° 55′ 5″ at OSM node n735636418 load it's distributaries

(unnamed) has 1 tributaries.

• 法多沢川, which joins it at N 34° 44′ 16″, E 137° 56′ 12″ at OSM node n735339704, and 7 km of total upstream flows in.
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