Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Tay Ninh | 2022/06/07 02:00 | Seita Watanabe v Masamichi Imamura | 3-6,1-6 |
| ITF M15 Tay Ninh | 2022/06/02 02:00 | Seita Watanabe v Thomas Fancutt | 0-6,5-7 |
| ITF M15 Tay Ninh | 2022/05/31 02:00 | Seita Watanabe v Ha Minh Duc Vu | 6-1,6-2 |
| ITF M25 Netanya | 2022/05/26 09:10 | Seita Watanabe v Calum Puttergill | 3-6,6-3,4-6 |
| ITF M25 Netanya | 2022/05/25 06:30 | Itamar Tapiro v Seita Watanabe | 3-6,1-6 |
| ITF M15 Akko | 2022/05/20 08:00 | Ben Patael v Seita Watanabe | 7-6,7-5 |
| ITF M15 Akko | 2022/05/19 07:00 | Preston Brown v Seita Watanabe | 4-6,6-2,6-7 |
| ITF M15 Akko | 2022/05/18 12:40 | Alec Beckley v Seita Watanabe | 2-6,5-7 |