The Dōzan River (銅山川, Dōzan-gawa) is the largest branch of the Yoshino River and flows through Ehime and Tokushima prefectures in Japan.

[1] Its name was derived from the Besshi copper mine that is now closed.

In Tokushima Prefecture, it is called the Iyo River (伊予川 Iyo-gawa).

[2] The rivers originates Mount Kanmuri on the borders of Ehime and Kōchi prefectures.

This article related to a river in Japan is a stub.