Japan trounced Peru in straight games in their women's Olympic volleyball qualifying tournament opener on Saturday.

At Tokyo's Yoyogi National Gymnasium, Japan defended well and attacked with ease, facing only moderate resistance in a 25-9, 25-19, 25-15 victory in the eight-team round robin, with two berths in next year's Paris Olympics up for grabs.

"You could really see the results of all our practice and how much the players love this game," Japan head coach Masayoshi Manabe said.

"The players were more nervous than I thought they'd be, but our serves were extremely good. Now, I hope we can maintain that quality in our remaining games."

Captain Sarina Koga scored a match-high 14 points, with Kotona Hayashi following with 12. Peru's highest scorer was Aixa Virgil with seven.

Japan will play Argentina on Sunday, Puerto Rico on Tuesday, and Bulgaria on Wednesday. From Friday, Japan will face Belgium, Turkey and Brazil over the final three days.

Two other women's qualifying tournaments are being held in China and Poland. Teams that fail to advance through these tournaments can still qualify based on their world rankings next June.

The men's competition starts Sept. 30.