Stadium: C Round: 25 Ground: Hardcourt outdoor
| ITF Women Toyota Qual | 2018/03/12 03:30 | Risa Ushijima v Misa Eguchi | 4-6,6-3,7-6 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Kanako Morisaki v Risa Ushijima | 3-6,1-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Mami Hasegawa v Risa Ushijima | 1-6,6-3,2-6 |
| 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 Kofu | 2017/06/14 05:00 | Na-Lae Han v Ryoko Ikeda | 6-3,6-2 |