| UTR Pro Takasaki Women | 2023/09/09 07:12 | Koharu Niimi v Annette Robertson | 6-1,6-2 |
| UTR Pro Takasaki Women | 2023/09/09 01:15 | Yuno Kitahara v Koharu Niimi | 6-4,6-2 |
| UTR Pro Takasaki Women | 2023/09/07 02:44 | Tomoko Kato v Koharu Niimi | 6-2,7-6 |
| UTR Pro Takasaki Women | 2023/09/06 03:00 | Sayuri Hata v Koharu Niimi | 1-6,6-3,4-6 |
| ITF W15 Antalya | 2023/03/30 08:00 | Matoula, Martha v Koharu Niimi | 6-1,6-2 |
| ITF W15 Antalya | 2023/03/29 13:40 | Kozakova, Karolina v Koharu Niimi | 1-6,3-6 |
| ITF W15 Antalya | 2023/03/28 09:10 | Koharu Niimi v Ines Faltinger | 6-1,6-1 |
| ITF W15 Antalya | 2023/03/27 08:50 | Lipiec, Xenia v Koharu Niimi | 4-6,5-7 |
| UTR Pro Takasaki Women | 2023/09/09 06:46 | 시게타, 무아 v Yui Owaki | 1-6,6-4,7-6 |
| UTR Pro Takasaki Women | 2023/09/09 03:00 | Yoshioka, Kisa v 시게타, 무아 | 1-6,6-1,7-5 |
| UTR Pro Takasaki Women | 2023/09/07 01:30 | Uchiyama, Honoka v 시게타, 무아 | 3-6,6-4,3-6 |
| UTR Pro Takasaki Women | 2023/09/06 02:16 | Higashitani, Nagomi v 시게타, 무아 | 6-3,6-2 |
| ITF W15 Sapporo | 2023/08/10 02:10 | 시게타, 무아 v 백, 다연 | 1-6,0-6 |
| ITF W15 Sapporo | 2023/08/08 02:30 | 시게타, 무아 v Yuna Kadowaki | 6-0,6-4 |
| ITF W15 Sapporo | 2023/08/02 02:20 | 시게타, 무아 v 아베, 히로미 | 1-6,0-6 |
| ITF W15 Sapporo | 2023/08/01 01:00 | 시게타, 무아 v Moeka Miyata | 7-5,0-6,4-10 |