Stadium: Court 9 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Tsukuba | 2023/03/30 01:00 | Renta Tokuda v Naoki Tajima | 6-0,6-4 |
| ITF M25 Kashiwa | 2023/04/03 01:00 | Renta Tokuda v Taiyo Yamanaka | 6-0,7-5 |
| ITF M25 Tsukuba | 2023/04/01 01:00 | Yu Hsiou Hsu v Renta Tokuda | 6-3,6-4 |
| ITF M25 Tsukuba | 2023/03/31 01:00 | Renta Tokuda v Yuki Mochizuki | 6-2,6-4 |
| ITF M25 Tsukuba | 2023/03/30 01:00 | Renta Tokuda v Naoki Tajima | 6-0,6-4 |
| ITF M15 Monastir | 2023/03/14 08:25 | Renta Tokuda v Simone Roncalli | 4-6,3-6 |
| ITF M15 Monastir | 2023/03/09 10:30 | Renta Tokuda v Tao Mu | 3-6,3-6 |
| ITF M15 Monastir | 2023/03/08 10:00 | Zoran Ludoski v Renta Tokuda | 0-6,2-6 |
| ITF M15 Monastir | 2023/03/04 10:40 | Moez Echargui v Renta Tokuda | 6-3,6-1 |
| 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 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Taiyo Yamanaka v Naoki Tajima | 6-4,5-7,8-10 |
| ITF M25 Canberra | 2023/03/22 03:45 | Dane Sweeny v Naoki Tajima | 6-1,6-3 |
| ITF M25 Canberra | 2023/03/20 23:00 | Naoki Tajima v Blake Bayldon | 6-3,6-0 |
| ITF M25 Canberra | 2023/03/20 01:30 | Naoki Tajima v Mason Naumovski | 6-3,7-6 |
| ITF M25 Canberra | 2023/03/15 23:00 | Dayne Kelly v Naoki Tajima | 6-1,6-2 |