2019 Toray Pan Pacific Open

The 2019 Toray Pan Pacific Open was a professional women's tennis tournament played on outdoor hard courts. It was the 36th edition of the Pan Pacific Open, and part of the Premier Series of the 2019 WTA Tour. It took place at the ITC Utsubo Tennis Center in Osaka, Japan, on 16–22 September 2019. This was the only time Osaka hosting the tournament after Tokyo was in preparation for the Summer Olympics the following year.

Seeds

 * Rankings are as of September 9, 2019

Other entrants
The following players received wild cards into the main singles draw:
 * 🇯🇵 Misaki Doi
 * 🇯🇵 Nao Hibino

The following players received entry from the singles qualifying draw:
 * 🇫🇷 Alizé Cornet
 * 🇰🇿 Zarina Diyas
 * 🇷🇺 Varvara Flink
 * 🇺🇸 Nicole Gibbs
 * 🇨🇳 Han Xinyun
 * 🇧🇬 Viktoriya Tomova

The following players received entry as lucky losers:
 * 🇺🇸 Whitney Osuigwe
 * 🇵🇱 Katarzyna Kawa

Withdrawals

 * 🇨🇦 Bianca Andreescu → replaced by Monica Puig
 * Belinda Bencic → replaced by 🇺🇸 Alison Riske
 * 🇪🇪 Anett Kontaveit → replaced by 🇷🇺 Anastasia Pavlyuchenkova
 * Petra Martić → replaced by 🇵🇱 Katarzyna Kawa
 * Anastasija Sevastova → replaced by 🇺🇸 Whitney Osuigwe
 * 🇨🇿 Markéta Vondroušová → replaced by 🇰🇿 Yulia Putintseva

Retirements

 * 🇺🇸 Madison Keys (left foot injury)

Seeds

 * Rankings are as of September 9, 2019

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇯🇵 Momoko Kobori / 🇯🇵 Ayano Shimizu

The following pair received entry as alternates:
 * 🇺🇸 Francesca Di Lorenzo / 🇵🇱 Katarzyna Kawa

Withdrawals

 * Before the tournament
 * Anastasija Sevastova (gastrointestinal illness)

Singles

 * 🇯🇵 Naomi Osaka def. 🇷🇺 Anastasia Pavlyuchenkova, 6–2, 6–3

Doubles

 * Chan Hao-ching / Latisha Chan def.  Hsieh Su-wei /  Hsieh Yu-chieh, 7–5, 7–5