# 2019 Fukuoka International Women's Cup – Singles

Katie Boulter was the defending champion, but chose not to participate.
Heather Watson won the title, defeating Zarina Diyas in the final, 7–6$^{(7–1)}$, 7–6$^{(7–4)}$.

## Seeds

* Zarina Diyas (final)
* Heather Watson (champion)
* Ayano Shimizu (quarterfinals)
* Kristie Ahn (semifinals, retired)
* Liang En-shuo (quarterfinals)
* Rebecca Marino (semifinals)
* Momoko Kobori (second round)
* Jamie Loeb (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 | Zarina Diyas | 6 | 6 | | | | |
| 6 | Rebecca Marino | 2 | 3 | | | | |
| 6 | Rebecca Marino | 2 | 3 | 1 | Zarina Diyas | 6$^1$ | 6$^4$ |
| | | | | 2 | Heather Watson | 7$^7$ | 7$^7$ |
| 4 | Kristie Ahn | 3 | 2$^r$ | 2 | Heather Watson | 7$^7$ | 7$^7$ |
| 2 | Heather Watson | 6 | 2 | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Z Diyas | 5 | 6 | 6 | | | | | | | | | | | | | |
| | A Bai | 7 | 3 | 2 | 1 | Z Diyas | 6 | 6 | | | | | | | | | |
| WC | M Ayukawa | 6 | 3 | 6 | WC | M Ayukawa | 1 | 0 | | | | | | | | | |
| | H Kaji | 4 | 6 | 2 | | | | | | 1 | Z Diyas | 6 | 6 | | | | |
| WC | M Uchijima | 4 | 2 | | | | | | | | R Ozaki | 0 | 2 | | | | |
| | B Cengiz | 6 | 6 | | | B Cengiz | 3 | 3 | | | | | | | | | |
| | R Ozaki | 6 | 6$^7$ | 6 | | R Ozaki | 6 | 6 | | | | | | | | | |
| 8 | J Loeb | 1 | 7$^9$ | 2 | | | | | | | | | | 1 | Z Diyas | 6 | 6 |
| 3 | A Shimizu | 4 | 7$^7$ | 6 | | | | | | | | | | 6 | R Marino | 2 | 3 |
| WC | Y Naito | 6 | 6$^5$ | 3 | 3 | A Shimizu | 2 | 7 | 6 | | | | | | | | |
| | M Inglis | 4 | | | | M Inglis | 6 | 5 | 4 | | | | | | | | |
| | K Dunne | 3$^r$ | | | | | | | | 3 | A Shimizu | 3 | 4 | | | | |
| Q | S Akita | 6 | 2 | 6 | | | | | | 6 | R Marino | 6 | 6 | | | | |
| | S-j Jang | 4 | 6 | 3 | Q | S Akita | 5 | 6$^3$ | | | | | | | | | |
| Q | M Hontama | 1 | 1 | | 6 | R Marino | 7 | 7$^7$ | | | | | | | | | |
| 6 | R Marino | 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 |
| 7 | M Kobori | 6 | 3 | 6 | | | | | | | | | | | | | |
| | K McPhee | 4 | 6 | 3 | 7 | M Kobori | 6$^6$ | 1 | | | | | | | | | |
| Q | E Shibahara | 4 | 3 | | Q | E Bektas | 7$^8$ | 6 | | | | | | | | | |
| Q | E Bektas | 6 | 6 | | | | | | Q | E Bektas | 4 | 6 | 0 | | | | |
| WC | K Morisaki | 2 | 5 | | | | | | 4 | K Ahn | 6 | 3 | 6 | | | | |
| | J Jakšić | 6 | 7 | | | J Jakšić | 3 | 4 | | | | | | | | | |
| | E Hozumi | 1 | 5 | | 4 | K Ahn | 6 | 6 | | | | | | | | | |
| 4 | K Ahn | 6 | 7 | | | | | | | | | | | 4 | K Ahn | 3 | 2$^r$ |
| 5 | E-s Liang | 6$^5$ | 7 | 6 | | | | | | | | | | 2 | H Watson | 6 | 2 |
| | M Imanishi | 7$^7$ | 5 | 2 | 5 | E-s Liang | 6 | 6 | | | | | | | | | |
| | N Broady | 6 | 7$^8$ | | | N Broady | 3 | 3 | | | | | | | | | |
| | J Namigata | 3 | 6$^6$ | | | | | | 5 | E-s Liang | 2 | 2 | | | | | |
| Q | L Küng | 6 | 6 | | | | | | 2 | H Watson | 6 | 6 | | | | | |
| | H Kuwata | 3 | 2 | | Q | L Küng | 2 | 4 | | | | | | | | | |
| Q | H Sakatsume | 2 | 1 | | 2 | H Watson | 6 | 6 | | | | | | | | | |
| 2 | H Watson | 6 | 6 | | | | | | | | | | | | | | |