Stadium: Court 7 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Nakhon Si Thammarat | 2024/02/22 03:30 | Nam Hoang Ly v Jumpei Yamasaki | 6-4,6-2 |
| ITF M15 Nakhon Si Thammarat | 2024/02/21 03:55 | Leo Vithoontien v Jumpei Yamasaki | 5-7,7-6,0-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/19 04:15 | Jumpei Yamasaki v Corban Crowther | 7-5,7-6 |
| ITF M15 Nakhon Si Thammarat Qual | 2024/02/18 07:00 | Jumpei Yamasaki v Anapat Timangkul | 6-2,4-6,10-2 |
| ITF M15 Nakhon Si Thammarat | 2024/02/12 04:45 | Jumpei Yamasaki v Krittin Koaykul | 4-6,3-6 |
| ITF M15 Yanagawa | 2023/12/30 01:00 | Duckhee Lee v Jumpei Yamasaki | 6-1,3-6,6-1 |
| ITF M15 Yanagawa | 2023/12/29 00:50 | Jumpei Yamasaki v Takuya Kumasaka | 6-1,6-4 |
| ITF M15 Yanagawa | 2023/12/28 00:55 | Jumpei Yamasaki v Yamato Sueoka | 7-5,6-1 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Kazuma Kawachi v Seiya Nakanishi | 6-3,6-0 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Ryotaro Matsumura v Seiya Nakanishi | 6-2,6-4 |
| ITF M25 Sapporo | 2023/09/05 04:15 | Issei Okamura v Seiya Nakanishi | 6-1,6-1 |
| ITF M25 Sapporo | 2023/09/04 03:35 | Ryusuke Horiuchi v Seiya Nakanishi | 6-4,2-6,10-12 |
| ITF M15 Karuizawa | 2023/05/28 01:15 | Seiya Nakanishi v Yua Taka | 4-6,2-6 |
| ITF M25 Kashiwa | 2023/04/02 00:30 | Jeremy Jin v Seiya Nakanishi | 6-3,6-2 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Seiya Nakanishi v Issei Okamura | 2-6,4-6 |
| Challenger Yokohama | 2022/10/30 02:35 | Seiya Nakanishi v Daisuke Sumizawa | 3-6,0-6 |