| Date: | 16–22 September |
| Edition: | 36th |
| Draw: | 28S / 16D |
| Prize Money: | $823,000 |
| Surface: | Hard / outdoor |
| Location: | Osaka, Japan |
| Venue: | Utsubo Tennis Center |
| Champs: |  Naomi Osaka |
| Champd: | Chan Hao-ching / Latisha Chan |
| Main Name: | Pan Pacific Open |
| After Year: | 2022 |
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.[1] [2]
| Event | Round of 16 | Round of 32 | width=85 | width=85 | width=85 | |||||||
| Singles | 470 | 305 | 185 | 100 | 55 | 1 | 25 | 13 | 1 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 1 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 | Q2 | width=85 | Q1 |
| Singles | $137,125 | $76,063 | $39,080 | $21,010 | $11,265 | $7,150 | $3,447 | $1,750 | |||||||||
| Doubles | $42,850 | $22,900 | $12,510 | $6,365 | $3,460 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Japan | Naomi Osaka | 4 | 1 | |
| Kiki Bertens | 8 | 2 | ||
| Sloane Stephens | 14 | 3 | ||
| Angelique Kerber | 15 | 4 | ||
| Madison Keys | 16 | 5 | ||
| Donna Vekić | 21 | 7 | ||
 Belgium | Elise Mertens | 24 | 9 |
The following players received wild cards into the main singles draw:
The following players received entry from the singles qualifying draw:
The following players received entry as lucky losers:
Bianca Andreescu → replaced by Monica Puig
Alison Riske
Anett Kontaveit → replaced by 
Anastasia Pavlyuchenkova
Katarzyna Kawa Whitney Osuigwe
Markéta Vondroušová → replaced by 
Yulia Putintseva Madison Keys (left foot injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Anna-Lena Grönefeld | Demi Schuurs | 24 | 1 | |||
| Chan Hao-ching | Latisha Chan | 32 | 2 | |||
| Nicole Melichar | Czech Republic | Květa Peschke | 38 | 3 | ||
| Darija Jurak | Katarina Srebotnik | 82 | 4 |
The following pair received a wildcard into the doubles main draw:
The following pair received entry as alternates:
See main article: 2019 Toray Pan Pacific Open – Singles.
Naomi Osaka def. Anastasia Pavlyuchenkova, 6–2, 6–3See main article: 2019 Toray Pan Pacific Open – Doubles.
