Stadium: Court 7 Round: 25 Ground: Grass
| ITF W25 Kofu | 2023/03/29 03:45 | Su Jeong Jang v Natsumi Kawaguchi | 6-7,7-6,6-0 |
| ITF W25 Kofu | 2023/03/28 05:35 | Dabin Kim v Natsumi Kawaguchi | 1-6,4-6 |
| ITF W25 Kofu | 2023/03/28 00:30 | Meng Yi Chen v Natsumi Kawaguchi | 0-6,2-6 |
| ITF W15 Hinode | 2023/03/26 06:00 | Aoi Ito v Natsumi Kawaguchi | 4-6,3-6 |
| ITF W15 Hinode | 2023/03/26 00:30 | Natsumi Kawaguchi v Ayumi Koshiishi | 6-1,6-2 |
| ITF W15 Hinode | 2023/03/24 00:00 | Akiko Omae v Natsumi Kawaguchi | 4-6,4-6 |
| ITF W15 Hinode | 2023/03/23 07:10 | Gyeong Seo Lee v Natsumi Kawaguchi | 3-6,3-6 |
| ITF W15 Hinode | 2023/03/22 04:30 | Kanako Osafune v Natsumi Kawaguchi | 3-6,1-6 |
| ITF W25 Kashiwa | 2023/04/03 01:00 | Eri Shimizu v Naho Sato | 6-7,3-6 |
| ITF W25 Kofu | 2023/03/29 00:30 | Eri Shimizu v Chihiro Muramatsu | 2-6,2-6 |
| ITF W40 Bengaluru | 2023/03/05 04:00 | Eri Shimizu v Akiko Omae | 1-6,7-5,1-6 |
| ITF W25 Bengaluru | 2023/03/03 06:50 | Misaki Matsuda v Eri Shimizu | 6-2,6-4 |
| ITF W25 Bengaluru | 2023/03/02 09:15 | Eri Shimizu v Vaidehi Chaudhari | 6-4,6-3 |
| ITF W25 Bengaluru | 2023/03/01 06:30 | Aliona Falei v Eri Shimizu | 6-4,5-7,6-7 |
| ITF W25 Bengaluru | 2023/02/27 08:20 | Eri Shimizu v Tina Nadine Smith | 7-6,6-3 |
| ITF W25 Bengaluru | 2023/02/26 07:55 | Eri Shimizu v Siri Patil | 6-0,6-0 |