Stadium: Court 14 Round: 54 Ground: Hardcourt outdoor
| ITF W25 Karuizawa | 2019/05/20 01:00 | Ikumi Yamazaki v Misaki Matsuda | 4-6,3-6 |
| ITF W15 Cairo | 2019/04/25 08:00 | Ikumi Yamazaki v Charlotte Roemer | 2-6,4-6 |
| ITF W15 Cairo | 2019/04/24 10:35 | Aya El Sayed v Ikumi Yamazaki | 4-6,4-6 |
| ITF W15 Cairo | 2019/04/22 08:00 | Chanel Janssen v Ikumi Yamazaki | 3-6,2-6 |
| ITF W15 Cairo | 2019/04/18 08:00 | Aya El Sayed v Ikumi Yamazaki | 7-6,6-7,7-6 |
| ITF W15 Cairo | 2019/04/17 10:15 | Hala Fouad v Ikumi Yamazaki | 0-6,1-6 |
| ITF W15 Cairo | 2019/04/16 09:00 | Ikumi Yamazaki v Shilpi S Das | 6-0,6-0 |
| ITF Women Kyoto | 2018/09/05 03:50 | Ikumi Yamazaki v Tori Kinard | 4-6,1-6 |
| ITF W15 Gimcheon | 2019/06/10 03:35 | Cherry Kim v Jiho Shin | 6-2,2-6,10-7 |
| ITF Women Kofu Qual | 2017/06/11 00:00 | Jiho Shin v Shiho Hisamatsu | 6-7,6-3,6-7 |