The 2016 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts.

It was the 33rd edition of the Pan Pacific Open, and part of the Premier Series of the 2016 WTA Tour.

It took place at the Ariake Coliseum in Tokyo, Japan, on 19–25 September 2016.

Caroline Wozniacki won the singles title.

^* Qualifiers prize money is also the round of 32 prize money The following players received wild cards into the main singles draw: The following players received entry from the singles qualifying draw: The following pairs received entry as alternates: