Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF W25 Makinohara | 2022/10/08 01:00 | Natsumi Kawaguchi v Ikumi Yamazaki | 4-6,1-6 |
| ITF W15 Hinode | 2024/03/21 01:00 | Kayo Nishimura v Natsumi Kawaguchi | 2-6,6-2,6-0 |
| ITF W15 Hinode | 2024/03/19 01:00 | Mio Mushika v Natsumi Kawaguchi | 4-6,7-6,4-6 |
| ITF W40 Yokohama | 2023/11/30 01:00 | Natsumi Kawaguchi v Mai Hontama | 4-6,3-6 |
| ITF W40 Yokohama | 2023/11/29 02:45 | Natsumi Kawaguchi v En Shuo Liang | 7-6,6-4 |
| ITF W100 Takasaki | 2023/11/20 02:30 | Luksika Kumkhum v Natsumi Kawaguchi | 6-3,4-6,7-5 |
| ITF W100 Takasaki | 2023/11/13 07:25 | Sijia Wei v Natsumi Kawaguchi | 7-5,6-0 |
| ITF W100 Takasaki | 2023/11/13 04:30 | Rinon Okuwaki v Natsumi Kawaguchi | 4-6,2-6 |
| ITF W60 Sydney | 2023/10/30 23:00 | Yuki Naito v Natsumi Kawaguchi | 7-5,7-5 |
| ITF W50 Kōfu | 2024/03/24 02:30 | Ikumi Yamazaki v Dayeon Back | 7-5,6-1 |
| ITF W15 Hinode | 2024/03/17 05:00 | Ikumi Yamazaki v Aely Arai | 6-1,2-6,9-11 |
| ITF W35 Nagpur | 2024/03/07 04:00 | Ikumi Yamazaki v Daria Kudashova | 6-7,2-6 |
| ITF W35 Nagpur | 2024/03/06 05:55 | Ikumi Yamazaki v Vaishnavi Adkar | 3-6,6-4,6-3 |
| ITF W35 Nagpur | 2024/03/04 04:30 | Ikumi Yamazaki v Suhitha Maruri | 6-1,6-1 |
| ITF W35 Nagpur | 2024/03/03 04:00 | Ikumi Yamazaki v Ishwari Matere | 6-1,6-2 |
| ITF W35 Gurugram | 2024/02/28 06:05 | Ikumi Yamazaki v Shrivalli Rashmikaa Bhamidipaty | 1-6,2-6 |
| ITF W35 Gurugram | 2024/02/27 04:00 | Ikumi Yamazaki v Yashaswini Panwar | 6-3,6-2 |