| Date: | 7–13 May |
| Edition: | 18th |
| Category: | ITF Women's Circuit |
| Location: | Fukuoka, Japan |
| Surface: | Carpet |
| Prize Money: | $60,000 |
| Champs: |  Katie Boulter |
| Champd: | Naomi Broady /  Asia Muhammad |
The 2018 Fukuoka International Women's Cup was a professional tennis tournament played on outdoor carpet courts. It was the eighteenth edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Fukuoka, Japan, on 7–13 May 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| United Kingdom | Naomi Broady | 128 | 1 | |
 Australia | Arina Rodionova | 138 | 2 | |
 Korea, Republic of | Jang Su-jeong | 172 | 3 | |
| United Kingdom | Gabriella Taylor | 173 | 4 | |
| United Kingdom | Katie Boulter | 174 | 5 | |
 Japan | ||||
| Japan | Junri Namigata | 206 | 7 | |
| United Kingdom | Laura Robson | 222 | 8 |
The following players received a wildcard into the singles main draw:
Misa Eguchi Yuki Naito Naho Sato Mei YamaguchiThe following players received entry from the qualifying draw:
Rika Fujiwara Tara Moore Olivia TjandramuliaThe following player received entry as a lucky loser:
Nagi Hanatani Erina Hayashi Aiko YoshitomiSee main article: 2018 Fukuoka International Women's Cup – Singles.
Katie Boulter def. 
Ksenia Lykina, 5–7, 6–4, 6–2 Naomi Broady / Asia Muhammad def. Tara Moore / Amra Sadiković, 6–2, 6–0