Stadium: Top Run - Court 1 Ground: Hardcourt outdoor
Referee:
| UTR Pro Kawaguchi | 2025/09/25 02:35 | Hien Q H Pham v Christopher Kosei Ono | 6-3,6-3 |
| UTR Pro Kawaguchi | 2025/09/23 01:00 | Rei Sato v Christopher Kosei Ono | 4-6,5-7 |
| UTR Pro Kawaguchi | 2025/09/22 01:00 | Christopher Kosei Ono v Yoshito Oda | 6-3,4-6,2-6 |
| UTR Pro Yokohama | 2025/08/14 03:10 | Christopher Kosei Ono v Katsutoshi Suzuki | 3-6,2-6 |
| UTR Pro Yokohama | 2025/08/13 10:40 | Christopher Kosei Ono v Ryotaro Matsumura | 2-6,1-6 |
| UTR Pro Yokohama | 2025/08/13 03:50 | Christopher Kosei Ono v Gaku Nayuki | 6-3,6-4 |
| UTR Pro Yokohama | 2025/08/12 01:55 | Christopher Kosei Ono v Jonathan Irwanto | 0-6,0-6 |
| UTR Pro Taiwan | 2025/07/05 03:30 | Christopher Kosei Ono v Jay Fairclough | 6-2,2-6,6-3 |