Stadium: Green Tennis Plaza - Court 07 Round: 28 Ground: Hardcourt outdoor
Referee:
| ITF M15 Harmon | 2025/06/10 23:58 | Seiya Nakanishi v Kenta Miyoshi | 0-6,2-6 |
| UTR Pro Kawaguchi | 2025/04/27 05:05 | Seiya Nakanishi v Kenta Nakamura | 6-1,6-4 |
| UTR Pro Kawaguchi | 2025/04/27 01:00 | Seiya Nakanishi v Alexey Shtengelov | 6-7,6-4,7-5 |
| UTR Pro Kawaguchi | 2025/04/25 03:00 | Seiya Nakanishi v Masaki Tonaka | 6-7,6-3,7-5 |
| UTR Pro Kawaguchi | 2025/04/24 06:25 | Seiya Nakanishi v Ryota Tanuma | 3-6,4-6 |
| UTR Pro Kawaguchi | 2025/04/24 00:00 | Ko Nagashima v Seiya Nakanishi | 3-6,7-5,6-1 |
| UTR Pro Kawaguchi | 2025/04/22 02:10 | Hikaru Takahashi v Seiya Nakanishi | 4-6,7-5,6-1 |
| ITF M15 Osaka | 2025/04/15 01:00 | Yusuke Kusuhara v Seiya Nakanishi | 6-2,7-6 |
| UTR Pro Newport Beach | 2025/04/12 21:10 | Harrison Satara v Chikaya Sato | 6-1,6-4 |
| UTR Pro Newport Beach | 2025/04/11 19:00 | Chikaya Sato v Joaquin Benoit | 1-6,2-6 |
| UTR Pro Newport Beach | 2025/04/10 19:00 | Chikaya Sato v Maciej Rajski | 0-6,5-7 |
| UTR Pro Newport Beach | 2025/04/09 19:00 | Gregory Gamal v Chikaya Sato | 2-6,7-5,6-3 |
| UTR Pro Newport Beach | 2025/04/08 19:00 | Maximilian Wuelfing v Chikaya Sato | 6-7,2-6 |
| UTR Pro Newport Beach | 2024/10/17 19:07 | Chikaya Sato v Karan Srivastava | 6-2,6-1 |
| UTR Pro Newport Beach | 2024/10/17 01:30 | Chikaya Sato v Boris Kozlov | 6-4,7-5 |
| UTR Pro Newport Beach | 2024/10/16 03:00 | Chikaya Sato v Antreas Djakouris | 4-6,3-6 |