(unnamed)

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(unnamed) flows into the sea: 3 km flows in at N 36° 26′ 16″, E 137° 52′ 57″ at OSM node n748289398. 546 m flows in at N 36° 26′ 16″, E 137° 52′ 57″ at OSM node n748289398. (unnamed) has 2 distributaries.

• 高瀬川 , which it joins at N 36° 27′ 1″, E 137° 51′ 46″ at OSM node n748045618, and 311 km of total upstream flows in. load it's distributaries
• 内川 , which it joins at the following points: 8 km of total upstream flows in at N 36° 25′ 4″, E 137° 53′ 3″ at OSM node n4841148793. 15 km of total upstream flows in at N 36° 24′ 0″, E 137° 53′ 22″ at OSM node n4869360671. load it's distributaries

(unnamed) has 3 tributaries.

• 神明沢, which joins it at N 36° 26′ 41″, E 137° 52′ 39″ at OSM node n748657297, and 1 km of total upstream flows in.
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• 北沢, which joins it at N 36° 27′ 36″, E 137° 52′ 34″ at OSM node n748647457, and 374 m of total upstream flows in.
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• 南沢, which joins it at N 36° 27′ 36″, E 137° 52′ 34″ at OSM node n748647457, and 241 m of total upstream flows in.
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