Round: 29 Ground: Hardcourt outdoor
| 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 Tsukuba | 2019/03/30 01:00 | Veldheer, Mick v Jumpei Yamasaki | 2-6,2-6 |
| ITF - M15 Tsukuba | 2019/03/29 01:00 | Brymer, Gage v Jumpei Yamasaki | 3-6,7-6,5-7 |
| ITF - M15 Tsukuba | 2019/03/28 01:00 | Tanaka, Yunosuke v Jumpei Yamasaki | 2-6,6-1,3-6 |
| ITF - M15 Tsukuba | 2019/03/27 02:25 | Jumpei Yamasaki v Masamichi Imamura | 6-1,4-6,6-4 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/24 01:30 | Jumpei Yamasaki v Sho Shimabukuro | 7-6,6-3 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/23 02:55 | Jumpei Yamasaki v Ryota Tanuma | 6-2,6-4 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/22 03:50 | Yusuke Takahashi v Jumpei Yamasaki | 3-6,1-6 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/21 04:10 | Jumpei Yamasaki v Song, Min-Kyu | 7-5,6-1 |
| ITF - M15 Tsukuba | 2019/03/30 01:00 | Naoki Tajima v Shintaro Imai | 1-6,2-6 |
| ITF - M15 Tsukuba | 2019/03/29 01:00 | Yuki Mochizuki v Shintaro Imai | 3-6,6-1,4-6 |
| ITF - M15 Tsukuba | 2019/03/28 01:00 | Ryota Tanuma v Shintaro Imai | 5-7,3-6 |
| ITF - M15 Tsukuba | 2019/03/26 03:20 | Shintaro Imai v Blake Ellis | 6-2,7-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/15 01:00 | Sekiguchi, Shuichi v Shintaro Imai | 6-3,6-0 |
| ITF - M15 Nishi-Tokyo | 2019/03/14 01:00 | Shintaro Imai v Jumpei Yamasaki | 3-6,6-3,6-3 |
| ITF - M15 Nishi-Tokyo | 2019/03/13 03:50 | Shintaro Imai v Naoki Tajima | 6-1,6-4 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/10 01:00 | Shintaro Imai v Nam, Ji Sung | 6-2,6-2 |