Issei Okamura leads 3 to 0 over 3 singles meetings since 2023. Last meeting on 01/09/2025 at M25 Sapporo.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 01/09/2025 | M25 Sapporo | Qualifiers | hard | Okamura | 4-6 7-6(5) 10-8 |
| 05/09/2023 | M25 Sapporo | Round 1 | hard | Okamura | 6-1 6-1 |
| 27/03/2023 | M25 Tsukuba | Qualifying 1 | hard | Okamura |
| hard | Okamura 3 - 0 Nakanishi |
| 2025 | Okamura 1 - 0 Nakanishi |
| 2023 | Okamura 2 - 0 Nakanishi |
71 wins, 91 losses since 2021 (43.8%).
Last matches: D D V D D
16 wins, 29 losses since 2021 (35.6%).
Last matches: D V V D D
Issei Okamura leads 3 to 0 over 3 singles meetings since 2023.
On 01/09/2025, at M25 Sapporo (Qualifiers): Issei Okamura won 4-6 7-6(5) 10-8.