Level, 2 wins each over 4 singles meetings since 2024. Last meeting on 22/04/2026 at W100 Tokyo.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 22/04/2026 | W100 Tokyo | Round 1 | hard | Kaji | 6-4 6-5 |
| 14/09/2024 | Korea Open - Seoul | Qualifying 1 | hard | Ku | |
| 30/07/2024 | W35 Roehampton | Round 1 | hard | Ku | 3-6 2-6 |
| 30/05/2024 | W35 Changwon | Round 2 | hard | Kaji | 6-2 3-6 3-6 |
| hard | Kaji 2 - 2 Ku |
| 2026 | Kaji 1 - 0 Ku |
| 2024 | Kaji 1 - 2 Ku |
167 wins, 137 losses since 2021 (54.9%).
Last matches: D V D V D
200 wins, 114 losses since 2021 (63.7%).
Last matches: D D V D V
Level, 2 wins each over 4 singles meetings since 2024.
On 22/04/2026, at W100 Tokyo (Round 1): Haruka Kaji won 6-4 6-5.