Stadium: Center Round: 26 Ground: Hardcourt outdoor
| ITF - Osaka W25 | 2019/04/09 01:00 | Risa Ozaki v Mei Yamaguchi | 6-4,4-6,6-2 |
| ITF - Kashiwa W25 | 2019/04/02 05:10 | Risa Ozaki v Daria Snigur | 6-0,3-6,4-6 |
| ITF - Canberra W25 | 2019/03/27 00:00 | Risa Ozaki v Alison Bai | 2-6,4-6 |
| ITF - Canberra W25 | 2019/03/24 00:00 | Risa Ozaki v Destanee Aiava | 2-6,2-6 |
| ITF - Canberra W25 | 2019/03/23 01:40 | Risa Ozaki v Eri Hozumi | 6-2,7-5 |
| ITF - Canberra W25 | 2019/03/22 00:50 | Risa Ozaki v Maddison Inglis | 6-7,7-6,7-5 |
| ITF - Canberra W25 | 2019/03/20 23:00 | Irina Maria Bara v Risa Ozaki | 6-7,2-6 |
| ITF - Canberra W25 | 2019/03/19 00:45 | Risa Ozaki v Gabriella Da Silva Fick | 6-0,6-3 |
| ITF - Osaka W25 | 2019/04/09 01:00 | Haruna Arakawa v Erika Sema | 0-6,2-6 |
| ITF - Kashiwa W25 | 2019/04/04 04:05 | Mayo Hibi v Erika Sema | 6-0,7-5 |
| ITF - Kashiwa W25 | 2019/04/03 00:30 | Chihiro Muramatsu v Erika Sema | 2-6,6-4,3-6 |
| ITF - Kashiwa W25 | 2019/04/02 00:00 | Erika Sema v Ji-Hee Choi | 6-4,6-3 |
| ITF - Kashiwa W25 | 2019/04/01 00:00 | Erika Sema v Risa Ushijima | 6-1,6-3 |
| ITF - Kofu W25 | 2019/03/25 00:30 | Ji-Hee Choi v Erika Sema | 6-3,6-0 |
| ITF - Kofu W25 | 2019/03/20 01:00 | Giulia Gatto Monticone v Erika Sema | 2-6,7-5,6-4 |
| ITF W25 Nishi-Tama | 2019/03/12 02:35 | Erika Sema v Emina Bektas | 4-6,6-3,3-10 |