Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF Women Yokohama Qual | 2018/03/05 03:00 | Risa Ushijima v Moyuka Uchijima | 4-6,6-7 |
| ITF Women Yokohama Qual | 2018/03/04 07:30 | Robin Anderson v Risa Ushijima | 7-6,6-7,1-6 |
| ITF Women Perth | 2018/02/22 06:10 | Jaimee Fourlis v Risa Ushijima | 6-2,6-3 |
| ITF Women Perth | 2018/02/21 03:35 | Isabella Bozicevic v Risa Ushijima | 0-6,4-6 |
| ITF Women Perth Qual | 2018/02/19 03:00 | Jia-Qi Kang v Risa Ushijima | 4-6,1-6 |
| ITF Women Perth Qual | 2018/02/18 03:00 | Natasha Camer-Pesci v Risa Ushijima | 3-6,2-6 |
| ITF Women Perth Qual | 2018/02/17 02:00 | Risa Ushijima v Alexandra Bozovic | 3-6,6-3,6-2 |
| ITF Women Perth Qual | 2018/02/12 04:50 | Varunya Wongteanchai v Risa Ushijima | 0-6,6-2,7-5 |