2019 Toray Pan Pacific Open – Singles

Karolína Plíšková was the defending champion, 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.

Seeds
The top four seeds received a bye into the second round. • #🇯🇵 Naomi Osaka (champion)

• # Kiki Bertens (second round)

• #🇺🇸 Sloane Stephens (second round)

• #🇩🇪 Angelique Kerber (semifinals)

• #🇺🇸 Madison Keys (quarterfinals, retired)

• # Anastasija Sevastova (withdrew)

• # Donna Vekić (second round)

• # Petra Martić (withdrew)

• #🇧🇪 Elise Mertens (semifinals)

Seeds
• # 🇫🇷 Alizé Cornet (qualified)

• # 🇰🇿 Zarina Diyas (qualified)

• # 🇦🇺 Astra Sharma (first round, retired)

• # 🇺🇸 Whitney Osuigwe (qualifying competition, lucky loser)

• # 🇵🇱 Katarzyna Kawa (qualifying competition, lucky loser)

• # 🇷🇺 Liudmila Samsonova (qualifying competition)

• # 🇺🇸 Nicole Gibbs (qualified)

• # 🇺🇸 Francesca Di Lorenzo (first round)

• # 🇸🇰 Kristína Kučová (first round)

• # 🇷🇺 Varvara Flink (qualified)

• # 🇨🇳 Han Xinyun (qualified)

• # 🇯🇵 Kurumi Nara (qualifying competition)

Qualifiers
• # 🇫🇷 Alizé Cornet

• # 🇰🇿 Zarina Diyas

• # 🇨🇳 Han Xinyun

• # 🇺🇸 Nicole Gibbs

• # 🇷🇺 Varvara Flink

• # 🇧🇬 Viktoriya Tomova

Lucky losers
• # 🇺🇸 Whitney Osuigwe

• # 🇵🇱 Katarzyna Kawa