Ariake Coliseum
The 2011 Toray Pan Pacific Open was a women's 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. Agnieszka Radwańska won the singles title.