Haruka Kaji leads 3 to 0 over 3 singles meetings since 2024. Last meeting on 10/04/2026 at W35 Osaka.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 10/04/2026 | W35 Osaka | Quarter-final | hard | Kaji | 7-6(3) 6-3 |
| 29/11/2024 | W50 Yokohama | Quarter-final | hard | Kaji | 1-6 2-6 |
| 28/05/2024 | W35 Changwon | Round 1 | hard | Kaji | 2-6 4-6 |
| hard | Kaji 3 - 0 Kawaguchi |
| 2026 | Kaji 1 - 0 Kawaguchi |
| 2024 | Kaji 2 - 0 Kawaguchi |
167 wins, 137 losses since 2021 (54.9%).
Last matches: D V D V D
125 wins, 88 losses since 2021 (58.7%).
Last matches: D D D V D
Haruka Kaji leads 3 to 0 over 3 singles meetings since 2024.
On 10/04/2026, at W35 Osaka (Quarter-final): Haruka Kaji won 7-6(3) 6-3.