| Champ: |  Naomi Osaka |
| Runner: |  Anastasia Pavlyuchenkova |
| Score: | 6–2, 6–3 |
| Draw: | 28 |
| Seeds: | 8 |
| Type: | singles doubles |
| Before Name: | Toray Pan Pacific Open – Singles |
| After Name: | Toray Pan Pacific Open – Singles |
| After Year: | 2022 |
See main article: article and 2019 Toray Pan Pacific Open.
Karolína Plíšková was the defending champion,[1] but chose to participate in Korea Open, instead.
Naomi Osaka became the first Japanese player (and the third overall) in 24 years to win the tournament, defeating Anastasia Pavlyuchenkova in straight sets.
The top four seeds received a bye into the second round.