Stadium: Center Court A Round: 27 Ground: Hardcourt outdoor
| ITF M25 Hongkong | 2019/06/09 04:00 | Shintaro Imai v Shuichi Sekiguchi | 6-2,6-1 |
| ITF M15 Nishitōkyō | 2019/03/15 01:00 | Shuichi Sekiguchi v Shintaro Imai | 6-3,6-0 |
| ITF Hong Kong F5 | 2016/12/29 23:00 | Shuichi Sekiguchi v Shintaro Imai | 7-6,6-3 |
| ITF M25 Sapporo | 2022/09/08 03:15 | Shuichi Sekiguchi v Taki Adachi | 6-3,6-0 |
| ITF M25 Sapporo | 2022/09/07 00:30 | Shuichi Sekiguchi v Masamichi Imamura | 7-6,1-6,6-0 |
| ITF M25 Sapporo | 2022/09/04 02:00 | Rio Noguchi v Shuichi Sekiguchi | 4-6,7-5,6-2 |
| ITF M25 Sapporo | 2022/09/03 01:00 | Yuki Mochizuki v Shuichi Sekiguchi | 6-0,2-6,3-6 |
| ITF M25 Sapporo | 2022/09/02 01:00 | Shuichi Sekiguchi v Daisuke Sumizawa | 7-6,7-6 |
| ITF M25 Sapporo | 2022/09/01 05:30 | Shuichi Sekiguchi v Kento Takeuchi | 6-2,6-4 |
| ITF M25 Sapporo | 2022/09/01 01:00 | Shuichi Sekiguchi v Yusuke Takahashi | 6-1,6-7,6-2 |
| ITF M15 Changwon | 2022/08/24 05:55 | Geni Inoue v Shuichi Sekiguchi | 3-6,6-3,6-4 |
| ITF M25 Sapporo | 2022/09/08 01:00 | Ryuki Matsuda v Shintaro Imai | 1-6,3-6 |
| ITF M25 Sapporo | 2022/09/01 04:35 | Daisuke Sumizawa v Shintaro Imai | 6-2,2-6,6-1 |
| ITF M25 Sapporo | 2022/08/30 02:10 | Toki Adachi v Shintaro Imai | 0-6,1-6 |
| ITF M15 Jakarta | 2022/08/21 02:00 | Mukund Sasikumar v Shintaro Imai | 3-6,3-6 |
| ITF M15 Jakarta | 2022/08/20 02:00 | Fitriadi M Rifqi v Shintaro Imai | 4-6,2-6 |
| ITF M15 Jakarta | 2022/08/18 02:00 | Kento Takeuchi v Shintaro Imai | 3-6,4-6 |
| ITF M15 Jakarta | 2022/08/17 02:00 | Ryuki Matsuda v Shintaro Imai | 0-6,4-6 |
| ITF M15 Jakarta | 2022/08/12 02:00 | S D Prajwal Dev v Shintaro Imai | 6-2,6-7,3-6 |