(unnamed)

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(unnamed) flows into the sea: 2 km flows in at N 35° 21′ 36″, E 136° 37′ 12″ at OSM node n5582115202. 2 km flows in at N 35° 21′ 34″, E 136° 37′ 10″ at OSM node n5582115195. 2 km flows in at N 35° 21′ 32″, E 136° 37′ 7″ at OSM node n5582115182. (unnamed) flows into 水門川 , which it joins at N 35° 19′ 42″, E 136° 37′ 23″ at OSM node n726454314, and there 16 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 水門川, which joins it at N 35° 22′ 0″, E 136° 37′ 11″ at OSM node n6601817387, and 2 km of total upstream flows in.
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• 大垣運河, which joins it at N 35° 21′ 29″, E 136° 36′ 23″ at OSM node n10724723784, and 70 m of total upstream flows in.
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