| UTR Pro Takasaki Women | 2023/09/07 00:45 | Aya Ishii v Kosaka Asahi | 6-1,6-2 |
| UTR Pro Takasaki Women | 2023/09/06 00:00 | Ai Yamaguchi v Kosaka Asahi | 6-3,6-1 |
| UTR Pro Noda Women | 2023/08/27 04:45 | Noelani Teso v Kosaka Asahi | 6-3,6-1 |
| UTR Pro Noda Women | 2023/08/25 01:30 | Kosaka Asahi v Hinata Chiba | 6-4,5-7,2-6 |
| UTR Pro Noda Women | 2023/08/22 00:30 | Uta Asakura v Kosaka Asahi | 6-1,5-1 |