(unnamed)

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(unnamed) flows into the sea: 5 km flows in at N 32° 45′ 35″, E 130° 47′ 20″ at OSM node n744811349. 1 km flows in at N 32° 45′ 50″, E 130° 46′ 29″ at OSM node n744598109. (unnamed) has 2 distributaries.

• 木山川 , which it joins at N 32° 45′ 46″, E 130° 47′ 14″ at OSM node n744595128, and 117 km of total upstream flows in. load it's distributaries
• 矢形川 , which it joins at N 32° 45′ 45″, E 130° 46′ 18″ at OSM node n744564902, and 50 km of total upstream flows in. load it's distributaries

(unnamed) has 0 tributaries.