2026 Japan Women's Open – Singles

Rare card · No. 33564

Kateřina Siniaková defeated Ashlyn Krueger in the final, 6–1, 6–0 to win the singles tennis title at the 2026 Japan Women's Open. It was her first singles title since Nanchang in 2023, and sixth WTA Tour singles title overall. Leylah Fernandez was the reigning champion, but chose to compete in Ningbo instead.