The Neo River (根尾川, Neo-gawa) is a river in Japan which flows through Gifu Prefecture, and is part of the Kiso River system.

[1] The river originates on Mount Nōgōhaku, which lies on the border of Gifu and Fukui prefectures.

The river passes through or forms the boundary of Motosu, Ibigawa, Ōno, and Hozumi, all in Gifu Prefecture.

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