Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| 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 Nishi-Tokyo | 2019/03/13 03:50 | Shintaro Imai v Naoki Tajima | 6-1,6-4 |
| ITF M15 Nishi-Tama | 2019/03/10 01:00 | Shintaro Imai v Ji Sung Nam | 6-2,6-2 |
| ITF M15 Nishi-Tama | 2019/03/09 01:00 | Shintaro Imai v Sho Shimabukuro | 6-4,6-3 |
| ITF M15 Nishi-Tama | 2019/03/08 04:10 | Shintaro Imai v Tomohiro Masabayashi | 6-3,6-2 |
| ITF M15 Nishi-Tama | 2019/03/07 04:00 | Shintaro Imai v Sho Katayama | 6-2,6-3 |
| ITF M15 Nishi-Tama | 2019/03/05 03:30 | Yusuke Takahashi v Shintaro Imai | 1-6,7-5,3-6 |
| Challenger Yokohama | 2019/02/26 01:00 | Shintaro Imai v David Perez Sanz | 2-6,3-6 |
| Challenger Yokohama | 2019/02/25 01:00 | Cheong-Eui Kim v Shintaro Imai | 6-1,7-5 |
| ITF M15 Nishi-Tokyo | 2019/03/13 02:20 | Jumpei Yamasaki v Michael Look | 6-4,2-6,6-2 |
| ITF M15 Nishi-Tama | 2019/03/09 01:00 | Jumpei Yamasaki v Ji Sung Nam | 2-6,1-6 |
| ITF M15 Nishi-Tama | 2019/03/08 06:50 | Seong Chan Hong v Jumpei Yamasaki | 6-3,6-7,2-6 |
| ITF M15 Nishi-Tama | 2019/03/08 02:30 | Gengo Kikuchi v Jumpei Yamasaki | 6-7,6-4,3-6 |
| ITF M15 Nishi-Tama | 2019/03/06 02:30 | Jumpei Yamasaki v Blake Ellis | 7-5,6-4 |
| ITF M15 Claremont | 2019/02/07 18:00 | Jenson Brooksby v Jumpei Yamasaki | 6-2,6-1 |
| ITF M15 Claremont | 2019/02/06 18:00 | Dusty H. Boyer v Jumpei Yamasaki | 6-4,3-6,6-7 |
| ITF M25 Weston | 2019/01/29 18:20 | Jumpei Yamasaki v Patrick Kypson | 2-6,3-6 |