Stadium: Court 2 Round: 28 Ground: Hardcourt outdoor
| 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 Thailand F5 | 2018/10/04 04:30 | Jumpei Yamasaki v Alexander Igoshin | 3-6,6-3,6-3 |
| ITF Thailand F5 | 2018/10/03 02:30 | Jumpei Yamasaki v Tsung-Hao Huang | 6-7,6-4,6-1 |
| ITF Thailand F5 | 2018/10/01 04:00 | Jumpei Yamasaki v Prachaya Baibong | 6-0,6-0 |
| ITF Thailand F4 | 2018/09/26 02:30 | Karunuday Singh v Jumpei Yamasaki | 6-4,7-5 |
| Challenger Kaohsiung | 2018/09/16 03:00 | Yuichi Sugita v Jumpei Yamasaki | 6-2,7-5 |
| Challenger Shanghai | 2018/09/09 03:00 | Tung-Lin Wu v Jumpei Yamasaki | 6-2,6-2 |
| Challenger Shanghai | 2018/09/08 03:00 | Abhinav Sanjeev Shanmugam v Jumpei Yamasaki | 4-6,7-6,3-6 |
| ITF Korea F5 | 2018/08/21 03:00 | Jumpei Yamasaki v Oh-Hee Kwon | 4-6,4-6 |
| ITF Thailand F5 | 2018/10/04 04:30 | Felix Corwin v Shintaro Imai | 6-7,4-6 |
| ITF Thailand F5 | 2018/10/03 03:40 | Ren Nakamura v Shintaro Imai | 1-6,2-6 |
| ITF Thailand F5 | 2018/10/02 07:25 | Michal Dembek v Shintaro Imai | 1-6,3-6 |
| ITF Thailand F4 | 2018/09/29 03:00 | Kento Takeuchi v Shintaro Imai | 2-6,6-4,3-6 |
| ITF Thailand F4 | 2018/09/27 02:30 | Soichiro Moritani v Shintaro Imai | 1-6,6-7 |
| ITF Thailand F4 | 2018/09/26 04:55 | Congsup Congcar v Shintaro Imai | 4-6,3-6 |
| ITF Thailand F4 | 2018/09/24 04:00 | Matic Spec v Shintaro Imai | 6-7,3-6 |
| Challenger Zhangjiagang | 2018/09/03 03:15 | Shintaro Imai v Sidharth Rawat | 3-6,1-6 |