Stadium: 7 Round: 26 Ground: Hardcourt outdoor
| Challenger Yokkaichi | 2022/11/22 02:20 | Keisuke Saitoh v Shintaro Imai | 4-6,0-6 |
| ITF M25 Sapporo | 2024/09/10 01:00 | Keisuke Saitoh v Daisuke Sumizawa | 6-1,6-2 |
| ITF M25 Sapporo | 2024/09/06 01:00 | Kokoro Isomura v Keisuke Saitoh | 6-2,6-4 |
| ITF M25 Sapporo | 2024/09/05 03:10 | Hiromasa Koyama v Keisuke Saitoh | 0-6,6-4,3-6 |
| ITF M25 Sapporo | 2024/09/04 01:00 | Keisuke Saitoh v Masamichi Imamura | 7-5,6-2 |
| ITF M25 Taipei | 2024/08/07 07:55 | Tsung-Hao Huang v Keisuke Saitoh | 6-3,6-2 |
| ITF M25 Taipei | 2024/08/04 02:00 | Yu Hsiou Hsu v Keisuke Saitoh | 3-6,1-6 |
| ITF M25 Taipei | 2024/08/03 01:55 | Keisuke Saitoh v Ryotaro Taguchi | 3-6,7-6,7-6 |
| ITF M25 Taipei | 2024/08/02 02:00 | Keisuke Saitoh v Takuya Kumasaka | 6-1,6-4 |
| ITF M25 Sapporo | 2024/09/11 04:30 | Hiroki Sakagawa v Shintaro Imai | 4-6,4-6 |
| ITF M25 Sapporo | 2024/09/05 01:00 | Yuta Kawahashi v Shintaro Imai | 1-6,7-6,6-1 |
| ITF M25 Sapporo | 2024/09/04 00:55 | Kazuki Nishiwaki v Shintaro Imai | 4-6,6-3,5-7 |
| ITF M15 Bali | 2024/08/30 02:30 | Luca Castelnuovo v Shintaro Imai | 7-6,6-3 |
| ITF M15 Bali | 2024/08/29 04:20 | Enzo Aguiard v Shintaro Imai | 4-6,6-3,1-6 |
| ITF M15 Bali | 2024/08/28 07:10 | Lorenzo Lorusso v Shintaro Imai | 6-7,5-7 |
| ITF M15 Tokyo | 2024/07/14 04:00 | Shintaro Imai v Woobin Shin | 6-4,6-4 |
| ITF M15 Tokyo | 2024/07/13 05:30 | Ryota Tanuma v Shintaro Imai | 3-6,5-7 |