2023 Japan Women's Open – Singles

Ashlyn Krueger defeated Zhu Lin in the final, 6–3, 7–6(8–6) to win the singles title at the 2023 Japan Women's Open. It was her first WTA Tour title.

Nao Hibino was the defending champion from when the tournament was last held in 2019, but lost in the first round to Rebecca Marino.

Seeds
• #🇨🇳 Zhu Lin (final)

• #🇩🇪 Tatjana Maria (first round)

• #🇨🇳 Wang Xinyu (semifinals)

• #🇨🇿 Linda Fruhvirtová (first round)

• #🇦🇷 Nadia Podoroska (second round)

• #🇰🇿 Yulia Putintseva (quarterfinals)

• #🇯🇵 Nao Hibino (first round)

• #🇺🇦 Kateryna Baindl (first round)

Seeds
• # 🇺🇸 Elizabeth Mandlik (qualified)

• # Valeria Savinykh (qualified)

• # 🇮🇳 Ankita Raina (qualified)

• # Despina Papamichail (qualifying competition)

• # Alexandra Eala (qualified)

• # 🇯🇵 Himeno Sakatsume (qualified)

• # Arianne Hartono (qualified)

• # 🇨🇳 You Xiaodi (first round, retired)

• # 🇭🇰 Eudice Chong (qualifying competition)

• # 🇯🇵 Haruka Kaji (qualifying competition)

• # 🇯🇵 Sakura Hosogi (first round)

• # 🇰🇷 Han Na-lae (first round)

Qualifiers
• # 🇺🇸 Elizabeth Mandlik

• # Valeria Savinykh

• # 🇮🇳 Ankita Raina

• # Arianne Hartono

• # Alexandra Eala

• # 🇯🇵 Himeno Sakatsume