(unnamed)

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(unnamed) flows into the sea: 2 km flows in at N 36° 39′ 25″, E 137° 20′ 33″ at OSM node n8478954835. (unnamed) has 2 distributaries.

• 白岩川 , which it joins at N 36° 41′ 53″, E 137° 20′ 8″ at OSM node n720786905, and 107 km of total upstream flows in. load it's distributaries
• 白岩川 (Shiraiwa River) , which it joins at N 36° 39′ 19″, E 137° 21′ 14″ at OSM node n720784767, and 33 km of total upstream flows in. load it's distributaries

(unnamed) has 0 tributaries.