Estadio: Court 6 Round: 26 Ground: Hardcourt outdoor
| ITF M15 El Cairo | 2021/01/26 08:00 | Taisei Ichikawa v Keisuke Saitoh | 2-6,5-7 |
| ITF M15 Yakarta | 2023/01/25 06:30 | Taisei Ichikawa v Yunseok Jang | 6-4,6-1 |
| Challenger de Kobe | 2022/11/14 04:25 | Damir Dzumhur v Taisei Ichikawa | 6-4,6-3 |
| Challenger de Yokohama | 2022/11/01 05:50 | Taisei Ichikawa v John Millman | 3-6,6-7 |
| Challenger de Yokohama | 2022/10/31 01:30 | Taisei Ichikawa v Daisuke Sumizawa | 2-6,6-4,6-2 |
| Challenger de Yokohama | 2022/10/30 02:45 | Ji Sung Nam v Taisei Ichikawa | 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 | 2022/09/07 02:40 | Ryota Tanuma v Taisei Ichikawa | 6-0,6-0 |
| ITF M25 Sapporo | 2022/09/01 01:00 | Yuki Mochizuki v Taisei Ichikawa | 6-0,6-7,6-2 |
| ITF M15 Yakarta | 2023/01/24 02:00 | Hao Yuan Ng v Keisuke Saitoh | 6-3,3-6,2-6 |
| ITF M15 Yakarta | 2023/01/19 02:30 | Sanhui Shin v Keisuke Saitoh | 5-7,6-1,6-1 |
| ITF M15 Yakarta | 2023/01/18 05:00 | Ray Ho v Keisuke Saitoh | 3-6,1-6 |
| Challenger de Yokkaichi | 2022/11/22 02:20 | Keisuke Saitoh v Shintaro Imai | 4-6,0-6 |
| Challenger de Kobe | 2022/11/13 02:10 | Keisuke Saitoh v Jason Jung | 6-4,3-6,3-6 |
| Challenger de Matsuyama | 2022/11/06 03:30 | Mukund Sasikumar v Keisuke Saitoh | 6-3,6-2 |
| Challenger de 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 |