Level, 1 wins each over 2 singles meetings since 2023. Last meeting on 22/05/2024 at W15 Fukui.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 22/05/2024 | W15 Fukui | Round 1 | hard | Koyama | 4-6 6-3 6-4 |
| 26/07/2023 | W15 Sapporo | Round 1 | hard | Arai | 7-6(5) 3-6 3-6 |
| hard | Koyama 1 - 1 Arai |
| 2024 | Koyama 1 - 0 Arai |
| 2023 | Koyama 0 - 1 Arai |
43 wins, 52 losses since 2021 (45.3%).
Last matches: D D D V D
20 wins, 20 losses since 2021 (50.0%).
Last matches: D D D D D
Level, 1 wins each over 2 singles meetings since 2023.
On 22/05/2024, at W15 Fukui (Round 1): Honori Koyama won 4-6 6-3 6-4.