# 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)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Zhu Lin | 7 | 7$^8$ | | | | |
| 3 | Wang Xinyu | 5 | 6$^6$ | | | | |
| 3 | Wang Xinyu | 5 | 6$^6$ | 1 | Zhu Lin | 3 | 6$^6$ |
| | | | | | Ashlyn Krueger | 6 | 7$^8$ |
| | Ashlyn Krueger | 6 | 6 | | Ashlyn Krueger | 6 | 7$^8$ |
| WC | Mai Hontama | 3 | 3 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | L Zhu | 6 | 6 | | | | | | | | | | | | | | | |
| | Xiy Wang | 4 | 4 | | 1 | L Zhu | 6 | 4 | 6 | | | | | | | | | |
| WC | M Uchijima | 6 | 6 | | WC | M Uchijima | 4 | 6 | 1 | | | | | | | | | |
| Q | A Raina | 4 | 2 | | | | | | | 1 | L Zhu | 6 | 6 | | | | | |
| Q | E Mandlik | 7 | 6 | | | | | | | Q | E Mandlik | 3 | 2 | | | | | |
| | D Parry | 5 | 2 | | Q | E Mandlik | 7 | 3 | 6 | | | | | | | | | |
| | R Marino | 6 | 6 | | | R Marino | 5 | 6 | 1 | | | | | | | | | |
| 7 | N Hibino | 3 | 4 | | | | | | | | | | | | 1 | L Zhu | 7 | 7$^8$ |
| 3 | Xin Wang | 7$^7$ | 6 | | | | | | | | | | | | 3 | Xin Wang | 5 | 6$^6$ |
| | J Teichmann | 6$^3$ | 3 | | 3 | Xin Wang | 6 | 6 | | | | | | | | | | |
| Q | H Sakatsume | 6 | 6 | | Q | H Sakatsume | 4 | 2 | | | | | | | | | | |
| Q | A Eala | 0 | 3 | | | | | | | 3 | Xin Wang | 7$^7$ | 6$^1$ | 6 | | | | |
| Q | V Savinykh | 6 | 1 | 6 | | | | | | 6 | Y Putintseva | 6$^4$ | 7$^7$ | 3 | | | | |
| | A-L Friedsam | 4 | 6 | 3 | Q | V Savinykh | 1 | 2 | | | | | | | | | | |
| | D Shnaider | 2 | 3 | | 6 | Y Putintseva | 6 | 6 | | | | | | | | | | |
| 6 | Y Putintseva | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | K Baindl | 2 | 3 | | | | | | | | | | | | | | |
| | A Krueger | 6 | 6 | | | A Krueger | 6 | 6 | | | | | | | | | |
| | V Golubic | 4 | 2 | | | J Ponchet | 4 | 1 | | | | | | | | | |
| | J Ponchet | 6 | 6 | | | | | | | A Krueger | 6 | 6 | | | | | |
| | J Niemeier | 4 | 4 | | | | | | | A Kalinskaya | 3 | 1 | | | | | |
| | A Kalinskaya | 6 | 6 | | | A Kalinskaya | 7$^7$ | 6 | | | | | | | | | |
| | H Dart | 7 | 5 | 6 | | H Dart | 6$^5$ | 2 | | | | | | | | | |
| 4 | L Fruhvirtová | 5 | 7 | 2 | | | | | | | | | | | A Krueger | 6 | 6 |
| 5 | N Podoroska | 6 | 3 | 7 | | | | | | | | | | WC | M Hontama | 3 | 3 |
| | Y Yuan | 4 | 6 | 5 | 5 | N Podoroska | 3 | 3 | | | | | | | | | |
| WC | M Hontama | 7 | 0 | 6 | WC | M Hontama | 6 | 6 | | | | | | | | | |
| | S-j Jang | 5 | 6 | 2 | | | | | WC | M Hontama | 6$^2$ | 6 | 6 | | | | |
| Q | A Hartono | 6 | 3 | 6 | | | | | Q | A Hartono | 7$^7$ | 4 | 1 | | | | |
| WC | M Doi | 2 | 6 | 3 | Q | A Hartono | 6 | 6 | | | | | | | | | |
| | P Udvardy | 2 | 6 | 7$^7$ | | P Udvardy | 2 | 0 | | | | | | | | | |
| 2 | T Maria | 6 | 4 | 6$^5$ | | | | | | | | | | | | | |

## Qualifying
### 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

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Elizabeth Mandlik | 2 | 6 | 6 | | | | |
| | Yang Ya-yi | 6 | 3 | 2 | | | | |
| | Yang Ya-yi | 6 | 3 | 2 | 1 | Elizabeth Mandlik | 6 | 6 |
| | | | | | 10 | Haruka Kaji | 1 | 2 |
| | Kyōka Okamura | 4 | 6 | 2 | 10 | Haruka Kaji | 1 | 2 |
| 10 | Haruka Kaji | 6 | 4 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Valeria Savinykh | 7$^8$ | 6 | | | | |
| WC | Aoi Ito | 6$^6$ | 1 | | | | |
| WC | Aoi Ito | 6$^6$ | 1 | 2 | Valeria Savinykh | 6 | 6 |
| | | | | | Carol Zhao | 3 | 2 |
| | Carol Zhao | 7 | 6 | | Carol Zhao | 3 | 2 |
| 12 | Han Na-lae | 5 | 2 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Ankita Raina | 6 | 7 | | | |
| WC | Yuki Naito | 3 | 5 | | | |
| WC | Yuki Naito | 3 | 5 | 3 | Ankita Raina | 2 |
| | | | | | Kateryna Volodko | 1$^r$ |
| | Kateryna Volodko | 6 | 6 | | Kateryna Volodko | 1$^r$ |
| 11 | Sakura Hosogi | 3 | 1 | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Despina Papamichail | 6 | 6$^4$ | 6 | | | | |
| | Naiktha Bains | 4 | 7$^7$ | 0 | | | | |
| | Naiktha Bains | 4 | 7$^7$ | 0 | 4 | Despina Papamichail | 1 | 5 |
| | | | | | 7 | Arianne Hartono | 6 | 7 |
| | Sofya Lansere | 4 | 6 | 2 | 7 | Arianne Hartono | 6 | 7 |
| 7 | Arianne Hartono | 6 | 3 | 6 | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Alexandra Eala | 6 | 6 | | | | | |
| | Fernanda Contreras | 3 | 4 | | | | | |
| | Fernanda Contreras | 3 | 4 | 5 | Alexandra Eala | 4 | 6 | 7 |
| | | | | | Park So-hyun | 6 | 1 | 5 |
| | Park So-hyun | 6 | 5 | | Park So-hyun | 6 | 1 | 5 |
| 8 | You Xiaodi | 3 | 1$^r$ | | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Himeno Sakatsume | 6 | 6 | | | | | |
| WC | Natsumi Kawaguchi | 3 | 3 | | | | | |
| WC | Natsumi Kawaguchi | 3 | 3 | 6 | Himeno Sakatsume | 6 | 5 | 6 |
| | | | | 9 | Eudice Chong | 3 | 7 | 0 |
| WC | Momoko Kobori | 4 | 6$^8$ | 9 | Eudice Chong | 3 | 7 | 0 |
| 9 | Eudice Chong | 6 | 7$^{10}$ | | | | | |