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)