Round: 26 Ground: Hardcourt outdoor
| ITF Japan F2 | 2017/03/14 02:30 | Jumpei Yamasaki v Jeamoon Lee | 1-6,3-6 |
| ITF Japan F3 | 2017/03/20 01:00 | Renta Tokuda v Jumpei Yamasaki | 3-6,6-1,3-6 |
| ITF Japan F2 | 2017/03/14 02:30 | Jumpei Yamasaki v Jeamoon Lee | 1-6,3-6 |
| ITF Japan F1 | 2017/03/07 02:40 | Jumpei Yamasaki v Gengo Kikuchi | 4-6,2-6 |
| Challenger Yokohama Qual | 2017/02/27 01:00 | Blake Mott v Jumpei Yamasaki | 6-0,6-1 |
| Challenger Yokohama Qual | 2017/02/26 02:20 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Yokohama Qual | 2017/02/25 03:15 | Jumpei Yamasaki v Roberto Quiroz | 6-3,3-6,7-5 |
| Challenger Kyoto | 2017/02/21 07:50 | Soonwoo Kwon v Jumpei Yamasaki | 6-1,6-1 |
| ITF Spain F4 | 2017/02/07 08:30 | Jumpei Yamasaki v Alberto Romero De Avila Senise | 6-3,3-6,3-6 |
| ITF Japan F3 | 2017/03/20 04:00 | Jeamoon Lee v Yosuke Watanuki | 6-3,2-6,6-0 |
| ITF Japan F3 | 2017/03/19 01:00 | Jeamoon Lee v Katsuki Nagao | 7-6,6-4 |
| ITF Japan F3 | 2017/03/18 08:00 | Jeamoon Lee v Yusei Fukuoka | 6-1,6-0 |
| ITF Japan F2 | 2017/03/16 02:00 | Jeamoon Lee v Nam Hoang Ly | 6-3,6-7,1-6 |
| ITF Japan F2 | 2017/03/14 02:30 | Jumpei Yamasaki v Jeamoon Lee | 1-6,3-6 |
| ITF Japan F2 | 2017/03/13 01:00 | Jeamoon Lee v Takao Suzuki | 6-4,6-0 |
| ITF Thailand F6 | 2016/12/27 04:40 | Fabien Reboul v Jeamoon Lee | 6-3,6-4 |
| ITF Thailand F6 | 2016/12/24 07:30 | Jeamoon Lee v Aleksandr Malyshev | 6-1,6-0 |