Australian Samantha Stosur swept past American Madison Keys at the Japan Open and will face Canadian teenager Eugenie Bouchard of Montreal in Sunday's final in Osaka.

Stosur, the No.3 seed and winner of this tournament four years ago, held all of her service games and easily overpowered Keys 6-1, 6-2.

Bouchard earlier defeated Japan's Kurumi Nara 6-2, 6-2.

It will be Stosur's 17th Tour final but Bouchard's first.