2011 Toray Pan Pacific Open – Singles

The 2011 Toray Pan Pacific Open was a tennis tournament played on outdoor hard courts. It was the 28th edition of the Toray Pan Pacific Open, and was part of the Premier Series of the 2011 WTA Tour. It took place at the Ariake Coliseum in Tokyo, Japan, from September 26 through October 2, 2011. Caroline Wozniacki was the defending champion, but lost to Kaia Kanepi in the third round. Agnieszka Radwańska won the title, defeating Vera Zvonareva 6–3, 6–2 in the final.