Leylah Fernandez defeated Tereza Valentová in the final, 6–0, 5–7, 6–3 to win the singles title at the 2025 Japan Women's Open. It was her fifth WTA Tour singles title.
Suzan Lamens was the defending champion, but lost in the second round to Naomi Osaka.
Seeds
Draw
Finals
Top half
Bottom half
Qualifying Seeds
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
References
External links Main draw Qualifying draw