Veronika Kudermetova defeated Jessica Pegula in the final, 7–5, 6–1 to win the singles tennis title at the 2023 Toray Pan Pacific Open.

[1] Liudmila Samsonova was the defending champion,[2] but lost in the second round to Ekaterina Alexandrova.

She lost to Maria Sakkari in the second round.

[4] The top two seeds received a bye into the second round.

Two Guadalajara semifinalists – Maria Sakkari and Caroline Garcia – also received a bye into the second round.