Stadium: Center Court Round: 62 Ground: Hardcourt outdoor
| ITF M15 Karuizawa | 2023/05/30 03:30 | Ryotaro Matsumura v Naoki Tajima | 3-6,6-1,6-4 |
| ITF M25 Jakarta | 2023/04/25 04:15 | Naoki Tajima v Credit Chaiyarin | 7-5,3-6,8-10 |
| ITF M25 Jakarta | 2023/04/24 06:30 | Naoki Tajima v Arsya Philo Wisyesa Putra Sjarifuddin | 6-0,6-0 |
| ITF M25 Jakarta | 2023/04/17 07:00 | Naoki Tajima v Andrew Rogers | 6-7,4-6 |
| ITF M25 Jakarta - Kval | 2023/04/16 04:40 | Pruchya Isarow v Naoki Tajima | 6-2,3-6,8-10 |
| ITF M25 Kashiwa | 2023/04/03 02:30 | Hiroyasu Ehara v Naoki Tajima | 6-4,6-2 |
| ITF M25 Tsukuba | 2023/03/30 01:00 | Renta Tokuda v Naoki Tajima | 6-0,6-4 |
| ITF M25 Tsukuba | 2023/03/27 06:00 | Naoki Tajima v Ryotaro Matsumura | 6-3,0-6,10-4 |