Stadium: Court 7 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Sapporo | 2022/09/07 00:30 | Kazuki Nishiwaki v Keisuke Saitoh | 3-6,2-6 |
| ITF M25 Sapporo | 2022/08/30 02:55 | Keisuke Saitoh v Daisuke Sumizawa | 5-7,6-3,4-6 |
| ITF M15 Kuching | 2022/08/04 04:30 | Tsung-Hao Huang v Keisuke Saitoh | 6-1,6-0 |
| ITF M15 Kuching | 2022/08/02 01:00 | Keisuke Saitoh v Vishnu Vardhan | 6-1,7-5 |
| ITF M15 Kuala Lumpur | 2022/07/30 01:00 | Nam Hoang Ly v Keisuke Saitoh | 6-2,6-3 |
| ITF M15 Kuala Lumpur | 2022/07/29 01:00 | Uisung Park v Keisuke Saitoh | 3-6,3-6 |
| ITF M15 Kuala Lumpur | 2022/07/26 02:15 | Hao Sheng Koay v Keisuke Saitoh | 3-6,1-6 |
| ITF M15 Monastir | 2022/07/07 11:05 | Keisuke Saitoh v Guy Orly Iradukunda | 1-6,0-6 |
| ITF M25 Sapporo | 2022/09/07 02:20 | Shunsuke Nakagawa v Geni Inoue | 7-6,6-0 |
| ITF M25 Sapporo | 2022/09/05 03:50 | Geni Inoue v Shunsuke Nakagawa | 6-2,0-6,6-10 |
| ITF M25 Sapporo | 2022/09/04 02:50 | Shunsuke Nakagawa v Nishith Naveen | 6-0,6-0 |