Stadium: Sub- Center Round: 25 Ground: Hardcourt outdoor
| Challenger Kobe | 2022/11/13 02:10 | Keisuke Saitoh v Jason Jung | 6-4,3-6,3-6 |
| Challenger Matsuyama | 2022/11/06 03:30 | Mukund Sasikumar v Keisuke Saitoh | 6-3,6-2 |
| Challenger Yokohama | 2022/10/31 01:30 | Seong Chan Hong v Keisuke Saitoh | 6-2,7-5 |
| ITF M25 Sapporo | 2022/09/10 00:50 | Rio Noguchi v Keisuke Saitoh | 1-6,6-3,6-0 |
| ITF M25 Sapporo | 2022/09/09 01:00 | Ryota Tanuma v Keisuke Saitoh | 6-0,4-6,3-6 |
| ITF M25 Sapporo | 2022/09/08 03:20 | Keisuke Saitoh v Shunsuke Nakagawa | 6-1,6-2 |
| 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 |
| Challenger Kobe | 2022/11/16 05:10 | Shintaro Imai v John Millman | 1-6,4-6 |
| Challenger Kobe | 2022/11/15 01:00 | Shintaro Imai v Hiroki Moriya | 6-4,6-3 |
| Challenger Seoul | 2022/10/09 07:40 | Max Purcell v Shintaro Imai | 2-6,6-3,6-4 |
| ATP Tokyo | 2022/10/01 02:00 | Shintaro Imai v Max Purcell | 6-4,6-7,5-7 |
| ITF M25 Kashiwa | 2022/09/27 01:00 | Taisei Ichikawa v Shintaro Imai | 6-7,6-4,2-6 |
| ITF M25 Sapporo | 2022/09/10 02:40 | Tatsuma Ito v Shintaro Imai | 5-7,6-2,7-6 |
| ITF M25 Sapporo | 2022/09/09 01:00 | Shuichi Sekiguchi v Shintaro Imai | 3-6,0-6 |
| ITF M25 Sapporo | 2022/09/08 01:00 | Ryuki Matsuda v Shintaro Imai | 1-6,3-6 |