Stadium: B5 Round: 54 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2024/04/30 08:30 | YeHua Zhou v Koharu Niimi | 6-1,6-2 |
| ITF W15 Monastir | 2024/04/29 08:30 | Teresa Franco Dias v Koharu Niimi | 1-6,1-6 |
| ITF W15 Monastir | 2024/04/21 12:30 | Uladzislava Zverava v Koharu Niimi | 0-6,6-3,10-2 |
| ITF W15 Monastir | 2024/04/18 11:15 | Sara Daavettila v Koharu Niimi | 6-1,6-2 |
| ITF W15 Monastir | 2024/04/17 12:35 | Koharu Niimi v Savanna Ly-Nguyen | 3-6,7-6,6-0 |
| ITF W15 Monastir | 2024/04/16 09:00 | Giulia Tedesco v Koharu Niimi | 4-6,2-6 |
| ITF W15 Monastir | 2024/04/07 08:30 | Lara Russiniello v Koharu Niimi | 4-6,6-4,11-9 |
| ITF W15 Antalya | 2023/12/12 06:30 | Rada Zolotareva v Koharu Niimi | 7-5,6-1 |
| ITF W15 Toyama | 2024/05/14 02:30 | Mua Shigeta v Honori Koyama | 3-6,1-6 |
| ITF W15 Hinode | 2024/03/18 01:00 | Yuno Kitahara v Honori Koyama | 6-2,6-2 |
| ITF W15 Hinode | 2024/03/17 00:00 | Honori Koyama v Mua Shigeta | 6-2,6-2 |
| ITF W15 Monastir | 2024/02/04 11:30 | Alice Soulie v Honori Koyama | 7-6,6-3 |
| ITF W15 Monastir | 2024/01/29 08:30 | Honori Koyama v Isabella B Aguirre | 4-6,6-1,4-10 |
| ITF W15 Monastir | 2024/01/28 12:00 | Christine Gouws v Honori Koyama | 1-6,0-6 |
| ITF W25 Makinohara | 2023/10/04 05:00 | Haruka Kaji v Honori Koyama | 6-1,6-1 |
| ITF W25 Kyoto | 2023/09/17 04:00 | Akiko Omae v Honori Koyama | 6-0,4-6,11-9 |