| ITF M25 Timaru | 2025/02/09 22:30 | Issei Okamura v Stefan Storch | 6-4,7-6 |
| UTR Pro Yokohama | 2025/02/01 06:15 | Issei Okamura v Kotaro Mochizuki | 2-6,4-6 |
| UTR Pro Yokohama | 2025/02/01 00:00 | Issei Okamura v Keisuke Ota | 6-2,7-5 |
| UTR Pro Yokohama | 2025/01/31 01:00 | Issei Okamura v Kazuki Sugimoto | 6-4,6-3 |
| UTR Pro Yokohama | 2025/01/29 03:40 | Issei Okamura v Daiki Sato | 7-5,6-4 |
| UTR Pro Yokohama | 2025/01/28 03:00 | Issei Okamura v Natsuki Yamamoto | 3-6,3-6 |
| UTR Pro Yokohama | 2025/01/27 04:00 | Jumpei Yamasaki v Issei Okamura | 6-2,7-5 |
| ITF M25 Carrara | 2024/11/27 04:35 | Issei Okamura v Thomas Braithwaite | 3-6,1-6 |
| ITF M15 Tauranga | 2024/12/14 20:30 | Lev Gorb v Sam Wensley | 6-3,5-7,1-10 |
| ITF M15 Wellington | 2024/12/09 01:30 | Anton Shepp v Lev Gorb | 6-4,6-4 |
| ITF M15 Wellington | 2024/12/08 20:30 | Lev Gorb v Zachary Adam-Gedge | 2-6,6-0,10-5 |