Stadium: KPI Park - Court 03 Ground: Hardcourt outdoor
Referee:
| UTR Pro Yokohama | 2025/03/11 02:10 | Ryotaro Matsumura v Christopher Kosei Ono | 6-2,6-1 |
| UTR Pro Noda | 2025/01/14 00:00 | Ryotaro Matsumura v Christopher Kosei Ono | 6-0,6-2 |
| UTR Pro Kawaguchi | 2025/04/26 05:20 | Christopher Kosei Ono v Kosuke Morita | 6-4,6-3 |
| UTR Pro Kawaguchi | 2025/04/25 05:50 | Christopher Kosei Ono v Noritaka Koizumi | 3-6,0-6 |
| UTR Pro Kawaguchi | 2025/04/24 06:05 | Christopher Kosei Ono v Yuga Tashiro | 4-6,2-6 |
| UTR Pro Kawaguchi | 2025/04/24 02:00 | Jared Horwood v Christopher Kosei Ono | 6-3,4-6,3-6 |
| UTR Pro Kawaguchi | 2025/04/22 04:25 | Alexey Shtengelov v Christopher Kosei Ono | 6-7,6-2,0-6 |
| UTR Pro Yokohama | 2025/03/13 01:00 | Christopher Kosei Ono v Hidetoshi Owada | 7-5,6-1 |
| UTR Pro Yokohama | 2025/03/11 02:10 | Ryotaro Matsumura v Christopher Kosei Ono | 6-2,6-1 |
| UTR Pro Yokohama | 2025/03/10 06:50 | Kai Kawano v Christopher Kosei Ono | 6-3,2-6,1-6 |
| ITF M15 Osaka | 2025/04/21 04:30 | Ryotaro Matsumura v Riku Takahata | 1-6,3-6 |
| ITF M15 Osaka | 2025/04/16 02:30 | Ryotaro Matsumura v Jumpei Yamasaki | 1-6,5-7 |
| ITF M15 Kashiwa | 2025/04/05 02:30 | Ryotaro Matsumura v Keisuke Saitoh | 6-4,2-6,3-6 |
| ITF M15 Kashiwa | 2025/04/02 01:00 | Ryotaro Matsumura v Daiki Yoshimura | 6-1,6-1 |
| ITF M15 Nishi-Tokyo | 2025/03/19 06:00 | Ryotaro Matsumura v Yamato Yukawa | 4-6,5-7 |
| UTR Pro Yokohama | 2025/03/14 03:25 | Ryotaro Matsumura v Takuto Terashima | 6-2,5-7,1-6 |
| UTR Pro Yokohama | 2025/03/13 05:35 | Ryotaro Matsumura v Hakuto Imanishi | 6-2,6-2 |
| UTR Pro Yokohama | 2025/03/11 02:10 | Ryotaro Matsumura v Christopher Kosei Ono | 6-2,6-1 |