Stadium: Court 2 Round: 54 Ground: Clay
| ITF M15 Doha | 2024/01/09 12:00 | Issei Okamura v Ammar Faleh Alhogbani | 6-7,2-6 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Issei Okamura v Jay Friend | 2-6,2-6 |
| ITF M15 Al Zahra | 2023/11/02 10:30 | Issei Okamura v Niklas Schell | 6-7,1-6 |
| ITF M15 Al Zahra | 2023/11/01 11:30 | Ali Alshati v Issei Okamura | 3-6,1-6 |
| ITF M25 Darwin | 2023/09/19 08:50 | Issei Okamura v Zak Talic | 6-7,6-3,3-6 |
| ITF M25 Darwin | 2023/09/14 05:25 | Brandon Walkin v Issei Okamura | 6-7,6-2,6-3 |
| ITF M25 Darwin | 2023/09/13 05:25 | Issei Okamura v Mason Naumovski | 6-4,4-6,6-4 |
| ITF M25 Sapporo | 2023/09/07 02:40 | Sora Fukuda v Issei Okamura | 6-1,6-2 |