WTA 250 · Hard · Osaka, Japan · WTA
Japan Open
Editions
| Year | Level | Champion | Finalist | Final |
|---|---|---|---|---|
| 2026 | WTA 250 | Katerina Siniakova | Ashlyn Krueger | 6-1 6-0 |
| 2025 | WTA 250 | Leylah Fernandez | Tereza Valentova | 6-0 5-7 6-3 |
| 2024 | WTA 250 | Suzan Lamens | Kimberly Birrell | 6-0 6-4 |
| 2023 | WTA 250 | Ashlyn Krueger | Lin Zhu | 6-3 7-6(6) |
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