(unnamed)

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(unnamed) flows into the sea: 2 km flows in at N 39° 24′ 3″, E 141° 4′ 33″ at OSM node n754252905. (unnamed) has 2 distributaries.

• 瀬川 , which it joins at N 39° 24′ 54″, E 141° 6′ 34″ at OSM node n753605595, and 50 km of total upstream flows in. load it's distributaries
• 枇杷沢川 , which it joins at N 39° 24′ 11″, E 141° 6′ 53″ at OSM node n754497617, and 7 km of total upstream flows in. load it's distributaries

(unnamed) has 0 tributaries.