2017 Toray Pan Pacific Open

The 2017 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts. It was the 34th edition of the Pan Pacific Open, and part of the Premier Series of the 2017 WTA Tour. It took place at the Ariake Coliseum in Tokyo, Japan, on 18–24 September 2017.

Seeds

 * Rankings are as of September 11, 2017

Other entrants
The following players received wild cards into the main singles draw:
 * 🇯🇵 Risa Ozaki
 * 🇯🇵 Kurumi Nara

The following players received entry from the singles qualifying draw:
 * 🇺🇸 Madison Brengle
 * 🇸🇰 Jana Čepelová
 * 🇵🇱 Magda Linette
 * Hsieh Su-wei

The following player received entry as a lucky loser:
 * 🇧🇾 Aliaksandra Sasnovich

Withdrawals

 * Before the tournament
 * 🇺🇸 Lauren Davis → replaced by 🇨🇳 Wang Qiang
 * 🇺🇸 Madison Keys → replaced by 🇰🇿 Yulia Putintseva
 * Ana Konjuh → replaced by 🇯🇵 Naomi Osaka
 * 🇨🇿 Petra Kvitová → replaced by 🇨🇿 Kateřina Siniaková
 * Mirjana Lučić-Baroni → replaced by 🇺🇸 Catherine Bellis
 * 🇵🇱 Agnieszka Radwańska → replaced by 🇧🇾 Aliaksandra Sasnovich
 * Anastasija Sevastova → replaced by 🇷🇺 Daria Kasatkina

Seeds

 * Rankings are as of September 11, 2017

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇯🇵 Mari Osaka / 🇯🇵 Naomi Osaka

Singles

 * Caroline Wozniacki def. 🇷🇺 Anastasia Pavlyuchenkova, 6–0, 7–5

Doubles

 * Andreja Klepač / 🇪🇸 María José Martínez Sánchez def. 🇦🇺 Daria Gavrilova / 🇷🇺 Daria Kasatkina, 6–3, 6–2