| Singles | |
|---|---|
| 2019 Japan Women's Open | |
| Champion |  Nao Hibino |
| Runner-up | Misaki Doi |
| Score | 6–3, 6–2 |
Hsieh Su-wei was the defending champion, [1] but lost to Nao Hibino in the quarterfinals.
Hibino went on to win the title, defeating Misaki Doi in the final, 6–3, 6–2.
Hsieh Su-wei (quarterfinals)
Veronika Kudermetova (semifinals)
Alison Van Uytvanck (quarterfinals) Anastasia Potapova (first round)
Tatjana Maria (first round)
Zarina Diyas (second round, retired)
Sara Sorribes Tormo (quarterfinals) Laura Siegemund (quarterfinals)| Semifinals | Final | ||||||||||||
| Nao Hibino | 4 | 6 | 6 | ||||||||||
 Mihaela Buzărnescu | 6 | 0 | 3 | ||||||||||
| Nao Hibino | 6 | 6 | |||||||||||
| Misaki Doi | 3 | 2 | |||||||||||
| Misaki Doi | 6 | 6 | |||||||||||
| 2 | Veronika Kudermetova | 4 | 3 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S-w Hsieh | 6 | 3 | 6 | |||||||||||||||||||||||
| WC | R Ozaki | 1 | 6 | 3 | 1 | S-w Hsieh | 1 | 77 | 7 | ||||||||||||||||||
 K Kawa | 0 | 6 | 4 |  P Hon | 6 | 62 | 5 | ||||||||||||||||||||
| P Hon | 6 | 1 | 6 | 1 | S-w Hsieh | 4 | 3 | ||||||||||||||||||||
| Q |  LA Fernandez | 77 | 65 | 5 | N Hibino | 6 | 6 | ||||||||||||||||||||
| N Hibino | 62 | 77 | 7 | N Hibino | 6 | 3 | |||||||||||||||||||||
 D Kovinić | 2 | 2 | 6 | Z Diyas | 1 | 2r | |||||||||||||||||||||
| 6 | Z Diyas | 6 | 6 | N Hibino | 4 | 6 | 6 | ||||||||||||||||||||
| 3 | A Van Uytvanck | 6 | 6 | M Buzărnescu | 6 | 0 | 3 | ||||||||||||||||||||
| Y Bonaventure | 4 | 2 | 3 | A Van Uytvanck | 6 | 3 | 6 | ||||||||||||||||||||
| L Samsonova | 62 | 4 | K Flipkens | 2 | 6 | 3 | |||||||||||||||||||||
| K Flipkens | 77 | 6 | 3 | A Van Uytvanck | 4 | 5 | |||||||||||||||||||||
| M Buzărnescu | 6 | 6 | M Buzărnescu | 6 | 7 | ||||||||||||||||||||||
| Q |  V Tomova | 1 | 4 | M Buzărnescu | 77 | 7 | |||||||||||||||||||||
| WC | K Nara | 6 | 6 | WC | K Nara | 61 | 5 | ||||||||||||||||||||
| 5 | T Maria | 4 | 4 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | S Sorribes Tormo | 6 | 3 | 6 | |||||||||||||||||||||||
| S Cîrstea | 2 | 6 | 2 | 7 | S Sorribes Tormo | 6 | 6 | ||||||||||||||||||||
| V Flink | 6 | 6 | V Flink | 3 | 1 | ||||||||||||||||||||||
 K Kučová | 3 | 2 | 7 | S Sorribes Tormo | 5 | 1 | |||||||||||||||||||||
| M Doi | 4 | 7 | 6 | M Doi | 7 | 6 | |||||||||||||||||||||
| Q | J Namigata | 6 | 5 | 2 | M Doi | 6 | 1 | 6 | |||||||||||||||||||
| Q | Z Hives | 64 | 6 | 6 | Q | Z Hives | 1 | 6 | 3 | ||||||||||||||||||
| 4 | A Potapova | 77 | 4 | 4 | M Doi | 6 | 6 | ||||||||||||||||||||
| 8 | L Siegemund | 6 | 6 | 2 | V Kudermetova | 4 | 3 | ||||||||||||||||||||
| Q | V Savinykh | 4 | 1 | 8 | L Siegemund | 6 | 5 | 7 | |||||||||||||||||||
| Q | PM Țig | 6 | 6 | Q | PM Țig | 2 | 7 | 5 | |||||||||||||||||||
| WC | A Shimizu | 4 | 2 | 8 | L Siegemund | 3 | 6 | 2 | |||||||||||||||||||
 C McHale | 6 | 6 | 2 | V Kudermetova | 6 | 4 | 6 | ||||||||||||||||||||
| G Minnen | 2 | 4 | C McHale | 67 | 2 | ||||||||||||||||||||||
| V Lepchenko | 4 | 2 | 2 | V Kudermetova | 79 | 6 | |||||||||||||||||||||
| 2 | V Kudermetova | 6 | 6 | ||||||||||||||||||||||||
Patricia Maria Țig (qualified)
Han Na-lae (qualifying competition) Zoe Hives (qualified) Viktoriya Tomova (qualified) Valeria Savinykh (qualified) Destanee Aiava (first round) Mayo Hibi (qualifying competition) Georgina García Pérez (first round) Leylah Annie Fernandez (qualified) Yuki Naito (first round) Jang Su-jeong (qualifying competition) Miharu Imanishi (qualifying competition)| First round | Qualifying competition | ||||||||||||
| 1 | Patricia Maria Țig | 3 | 7 | 6 | |||||||||
| Chihiro Muramatsu | 6 | 5 | 3 | ||||||||||
| 1 | Patricia Maria Țig | 6 | 6 | ||||||||||
| Kyōka Okamura | 1 | 1 | |||||||||||
| Kyōka Okamura | 6 | 6 | |||||||||||
| 10 | Yuki Naito | 2 | 4 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Han Na-lae | 77 | 3 | ||||||||||
| WC | Miyu Kato | 61 | 2r | ||||||||||
| 2 | Han Na-lae | 3 | 2 | ||||||||||
| 9 | Leylah Annie Fernandez | 6 | 6 | ||||||||||
| Erina Hayashi | 0 | 4 | |||||||||||
| 9 | Leylah Annie Fernandez | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Zoe Hives | 3 | 6 | 77 | |||||||||
| Akiko Omae | 6 | 2 | 65 | ||||||||||
| 3 | Zoe Hives | 6 | 6 | ||||||||||
| 12 | Miharu Imanishi | 3 | 4 | ||||||||||
| Mai Hontama | 4 | 6 | 4 | ||||||||||
| 12 | Miharu Imanishi | 6 | 2 | 6 | |||||||||
| First round | Qualifying competition | ||||||||||||
| 4 | Viktoriya Tomova | 6 | 6 | ||||||||||
| Ena Shibahara | 4 | 1 | |||||||||||
| 4 | Viktoriya Tomova | 4 | 6 | 6 | |||||||||
| 7 | Mayo Hibi | 6 | 4 | 2 | |||||||||
| WC | Himari Sato | 1 | 2 | ||||||||||
| 7 | Mayo Hibi | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 5 | Valeria Savinykh | 6 | 2 | ||||||||||
| WC | Ayumi Morita | 2 | 3r | ||||||||||
| 5 | Valeria Savinykh | 6 | 7 | ||||||||||
| 11 | Jang Su-jeong | 4 | 5 | ||||||||||
| PR |  Susanne Celik | 4 | 4 | ||||||||||
| 11 | Jang Su-jeong | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 6 | Destanee Aiava | 2 | 4 | ||||||||||
| Junri Namigata | 6 | 6 | |||||||||||
| Junri Namigata | 6 | 2 | 6 | ||||||||||
| WC | Moyuka Uchijima | 2 | 6 | 4 | |||||||||
| WC | Moyuka Uchijima | 2 | 6 | 6 | |||||||||
| 8 | Georgina García Pérez | 6 | 3 | 0 | |||||||||
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