Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M15 - Tsukuba | 2019/03/31 02:00 | Jumpei Yamasaki v Shintaro Imai | 4-6,4-6 |
| ITF M15 - Nishi-Tokyo | 2019/03/14 01:00 | Shintaro Imai v Jumpei Yamasaki | 3-6,6-3,6-3 |
| ITF Thailand F5 | 2018/10/05 04:00 | Jumpei Yamasaki v Shintaro Imai | 2-6,4-6 |
| ITF Japan F5 | 2018/04/04 01:00 | Shintaro Imai v Jumpei Yamasaki | 6-3,6-4 |
| ITF Hong Kong F2 | 2017/06/29 02:00 | Jumpei Yamasaki v Shintaro Imai | 4-6,2-6 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/17 12:45 | Lucas Catarina v Jumpei Yamasaki | 6-2,6-4 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/08 09:30 | Jumpei Yamasaki v Chien Hsun Lo | 3-6,4-6 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/07 13:00 | Jumpei Yamasaki v Rishi Reddy | 6-4,6-4 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/01 12:30 | Jumpei Yamasaki v Daisuke Sumizawa | 6-4,1-6,8-10 |
| ITF - M15 Sharm-el-Sheikh | 2021/01/31 17:30 | Jumpei Yamasaki v Federico Bertuccioli | 6-3,6-2 |
| ITF M15 - Caïro | 2021/01/28 10:00 | Rimpei Kawakami v Jumpei Yamasaki | 4-6,7-6,7-5 |
| ITF M15 - Caïro | 2021/01/27 11:55 | Sherif Makhlouf v Jumpei Yamasaki | 1-6,2-6 |
| ITF M15 - Caïro | 2021/01/20 11:15 | Jumpei Yamasaki v Yurii Dzhavakian | 4-6,1-6 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/17 13:05 | Yu Hsiou Hsu v Shintaro Imai | 6-1,7-5 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/10 07:30 | Shintaro Imai v Zsombor Piros | 3-6,6-1,6-7 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/04 08:00 | Shintaro Imai v Marek Gengel | 2-6,3-6 |
| ITF - M15 Sharm-el-Sheikh | 2021/02/03 07:30 | Shintaro Imai v David Poljak | 6-4,6-4 |
| Challenger - Calgary | 2020/02/26 19:45 | Julian Lenz v Shintaro Imai | 6-3,3-6,7-6 |
| Challenger - Calgary | 2020/02/25 17:00 | Shintaro Imai v Harri Heliovaara | 6-0,6-2 |
| Challenger - Drummondville | 2020/02/18 16:50 | Shintaro Imai v Tobias Kamke | 3-6,6-1,3-6 |
| Challenger - Drummondville | 2020/02/16 16:25 | Shintaro Imai v Michael Redlicki | 7-6,6-3 |