# 2018 Fukuoka International Women's Cup – Singles

Magdaléna Rybáriková was the defending champion, but chose to compete in Madrid instead.
Katie Boulter won the title, defeating Ksenia Lykina in the final, 5–7, 6–4, 6–2.

## Seeds

* Naomi Broady (quarterfinals)
* Arina Rodionova (semifinals)
* Jang Su-jeong (second round)
* Gabriella Taylor (first round)
* Katie Boulter (champion)
* Miharu Imanishi (withdrew)
* Junri Namigata (second round)
* Laura Robson (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 | Final |
| 5 | Katie Boulter | 6 | 6 | | | | | |
| | Momoko Kobori | 1 | 4 | | | | | |
| | Momoko Kobori | 1 | 4 | 5 | Katie Boulter | 5 | 6 | 6 |
| | | | | | Ksenia Lykina | 7 | 4 | 2 |
| | Ksenia Lykina | 6 | 6 | | Ksenia Lykina | 7 | 4 | 2 |
| 2 | Arina Rodionova | 1 | 4 | | | | | |

### Top 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 |
| 1 | N Broady | 6 | 7$^7$ | | | | | | | | | | | | | | |
| | A Shimizu | 1 | 6$^4$ | | 1 | N Broady | 6 | 6 | | | | | | | | | |
| | A Tere-Apisah | 6 | 6 | | | A Tere-Apisah | 2 | 2 | | | | | | | | | |
| | C Muramatsu | 3 | 2 | | | | | | 1 | N Broady | 4 | 6 | 2 | | | | |
| | H Kaji | 6$^4$ | 3 | | | | | | 5 | K Boulter | 6 | 3 | 6 | | | | |
| | T Patterson | 7$^7$ | 6 | | | T Patterson | 3 | 1 | | | | | | | | | |
| WC | Y Naito | 6 | 4 | 4 | 5 | K Boulter | 6 | 6 | | | | | | | | | |
| 5 | K Boulter | 4 | 6 | 6 | | | | | | | | | | 5 | K Boulter | 6 | 6 |
| 3 | S-j Jang | 6 | 6 | | | | | | | | | | | | M Kobori | 1 | 4 |
| LL | A Yoshitomi | 1 | 2 | | 3 | S-j Jang | 6$^4$ | 4 | | | | | | | | | |
| | M Kobori | 6 | 2 | 6 | | M Kobori | 7$^7$ | 6 | | | | | | | | | |
| WC | N Sato | 3 | 6 | 1 | | | | | | M Kobori | 3 | 7 | 6 | | | | |
| | I Jorović | 6 | 7$^7$ | | | | | | | I Jorović | 6 | 5 | 2 | | | | |
| | H Kuwata | 2 | 6$^3$ | | | I Jorović | 7$^7$ | 6 | | | | | | | | | |
| | J Cako | 1 | 4 | | 7 | J Namigata | 6$^2$ | 4 | | | | | | | | | |
| 7 | J Namigata | 6 | 6 | | | | | | | | | | | | | | |

### Bottom 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 |
| 8 | L Robson | 5 | 4 | | | | | | | | | | | | | | | |
| | K Dunne | 7 | 6 | | | K Dunne | 7 | 6 | | | | | | | | | | |
| | A Sadiković | 7$^7$ | 6 | | | A Sadiković | 5 | 2 | | | | | | | | | | |
| | S Akita | 6$^5$ | 2 | | | | | | | | K Dunne | 2 | 1 | | | | | |
| Q | O Tjandramulia | 7$^7$ | 6 | | | | | | | | K Lykina | 6 | 6 | | | | | |
| | M Inoue | 6$^5$ | 4 | | Q | O Tjandramulia | 4 | 1 | | | | | | | | | | |
| | K Lykina | 6$^3$ | 6 | 6 | | K Lykina | 6 | 6 | | | | | | | | | | |
| 4 | G Taylor | 7$^7$ | 1 | 2 | | | | | | | | | | | | K Lykina | 6 | 6 |
| LL | N Hanatani | 2 | 4 | | | | | | | | | | | | 2 | Ar Rodionova | 1 | 4 |
| WC | M Eguchi | 6 | 6 | | WC | M Eguchi | 4 | 4 | | | | | | | | | | |
| Q | R Fujiwara | 6 | 6 | | Q | R Fujiwara | 6 | 6 | | | | | | | | | | |
| LL | E Hayashi | 4 | 4 | | | | | | | Q | R Fujiwara | 6 | 2 | 3 | | | | |
| Q | T Moore | 6 | 2 | 6 | | | | | | 2 | Ar Rodionova | 4 | 6 | 6 | | | | |
| | A Muhammad | 2 | 6 | 3 | Q | T Moore | 6 | 0 | 1 | | | | | | | | | |
| WC | M Yamaguchi | 0 | 5 | | 2 | Ar Rodionova | 3 | 6 | 6 | | | | | | | | | |
| 2 | Ar Rodionova | 6 | 7 | | | | | | | | | | | | | | | |