(unnamed)

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(unnamed) flows into the sea: 702 m flows in at N 35° 46′ 57″, E 137° 57′ 7″ at OSM node n9710408151. (unnamed) flows into 天竜川 , which it joins at N 35° 46′ 21″, E 137° 57′ 39″ at OSM node n748089928, and there 1,224 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 堂沢川, which joins it at N 35° 46′ 49″, E 137° 57′ 9″ at OSM node n748209801, and 3 km of total upstream flows in.
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