Stadium: KPI Park - Court 03 Ground: Hardcourt outdoor
Referee:
| UTR Pro Yokohama | 2025/02/01 00:00 | Issei Okamura v Keisuke Ota | 6-2,7-5 |
| UTR Pro Yokohama | 2025/01/31 01:00 | Koki Matsuda v Keisuke Ota | 6-1,6-1 |
| UTR Pro Yokohama | 2025/01/30 03:05 | Kazuki Saito v Keisuke Ota | 5-7,4-6 |
| UTR Pro Yokohama | 2025/01/29 04:50 | Mao Takada v Keisuke Ota | 5-7,5-7 |
| UTR Pro Yokohama | 2025/01/27 01:30 | Arjun Mehrotra v Keisuke Ota | 6-4,7-6 |
| ITF M15 Yanagawa | 2024/10/28 04:00 | Keisuke Ota v Ke Hau Hung | 3-6,3-6 |
| ITF M15 Tanagura | 2024/10/20 00:30 | Keisuke Ota v Shu Muto | 4-6,0-6 |
| ITF M25 Sapporo | 2024/09/02 01:00 | Hiroki Sakagawa v Keisuke Ota | 6-0,6-0 |
| UTR Pro Noda | 2025/01/18 04:15 | Ryotaro Matsumura v Yoshinori Kobayashi | 7-5,6-3 |
| UTR Pro Noda | 2025/01/17 03:55 | Koki Matsuda v Yoshinori Kobayashi | 6-7,1-6 |
| UTR Pro Noda | 2025/01/16 00:30 | Yuga Tashiro v Yoshinori Kobayashi | 2-6,0-6 |
| UTR Pro Noda | 2025/01/15 00:00 | Andras Necz v Yoshinori Kobayashi | 3-6,4-6 |
| UTR Pro Noda | 2025/01/13 03:25 | Seiya Nakanishi v Yoshinori Kobayashi | 3-6,2-6 |
| UTR Pro Kawaguchi | 2024/06/29 09:00 | Yoshinori Kobayashi v Kosuke Nakanishi | 1-6,2-6 |
| UTR Pro Kawaguchi | 2024/06/29 01:00 | Shu Matsuoka v Yoshinori Kobayashi | 6-7,4-6 |
| UTR Pro Kawaguchi | 2024/06/27 00:30 | Corey Craig v Yoshinori Kobayashi | 6-1,6-3 |