Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF Japan F3 | 2017/03/22 04:45 | Jumpei Yamasaki v Jeamoon Lee | 6-7,3-6 |
| ITF Japan F2 | 2017/03/14 02:30 | Jumpei Yamasaki v Jeamoon Lee | 1-6,3-6 |
| ITF M25 Kashiwa | 2023/04/09 02:00 | Yu Hsiou Hsu v Jeamoon Lee | 6-1,6-1 |
| ITF M25 Kashiwa | 2023/04/08 03:00 | Renta Tokuda v Jeamoon Lee | 7-5,3-6,2-6 |
| ITF M25 Kashiwa | 2023/04/07 03:00 | Jeamoon Lee v Kaito Uesugi | 6-4,6-2 |
| ITF M25 Kashiwa | 2023/04/04 01:00 | Tristan Schoolkate v Jeamoon Lee | 4-6,6-1,5-7 |
| ITF M25 Tsukuba | 2023/03/29 02:05 | Jeamoon Lee v Dane Sweeny | 3-6,4-6 |
| ITF M15 Jakarta | 2023/01/25 03:30 | Jeamoon Lee v Mitsuki Wei Kang Leong | 4-6,3-6 |
| ITF M15 Jakarta | 2023/01/20 02:00 | Jeamoon Lee v Tsung-Hao Huang | 4-6,5-7 |
| ITF M15 Jakarta | 2023/01/19 04:10 | Jeamoon Lee v Kokoro Isomura | 6-1,6-1 |
| ITF M15 Heraklion | 2022/10/14 08:50 | Simone Roncalli v Jumpei Yamasaki | 6-4,6-3 |
| ITF M15 Heraklion | 2022/10/13 08:40 | Thantub Suksumrarn v Jumpei Yamasaki | 6-7,2-6 |
| ITF M15 Heraklion | 2022/10/12 11:40 | Gianluca Cadenasso v Jumpei Yamasaki | 6-7,3-6 |
| UTR Pro Tennis Series Miki | 2022/07/09 00:30 | Asahi Harazaki v Jumpei Yamasaki | 7-5,5-2 |
| UTR Pro Tennis Series Miki | 2022/07/08 00:30 | Yuichiro Inui v Jumpei Yamasaki | 3-6,6-3,4-6 |
| UTR Pro Tennis Series Miki | 2022/07/07 04:58 | Kento Tagashira v Jumpei Yamasaki | 4-6,3-6 |
| UTR Pro Tennis Series Miki | 2022/07/05 00:30 | Reiya Komagata v Jumpei Yamasaki | 0-6,3-6 |
| UTR Pro Tennis Series Miki | 2022/07/04 02:00 | Jumpei Yamasaki v Ryotaro Matsumura | 6-4,6-2 |