Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF Women Kofu Qual | 2018/03/25 04:00 | Jia-Qi Kang v Natsumi Koshino | 6-3,1-6,4-6 |
| ITF Women Nishi-Tama | 2018/03/17 01:00 | Mei Yamaguchi v Natsumi Koshino | 6-2,6-0 |
| ITF Women Yokohama Qual | 2018/03/04 04:00 | Natsumi Koshino v Misa Eguchi | 3-6,2-6 |
| ITF Women Kofu Qual | 2018/03/25 04:00 | Suzuka Furukawa v Risa Ushijima | 3-6,0-6 |
| ITF Women Kofu Qual | 2018/03/24 07:00 | Robu Kajitani v Risa Ushijima | 0-6,7-6,2-6 |
| ITF Women Nishi-Tama | 2018/03/24 02:00 | Na Ri Kim v Risa Ushijima | 6-1,6-1 |
| ITF Women Nishi-Tama | 2018/03/23 02:30 | Risa Ushijima v Giulia Gatto Monticone | 6-1,6-3 |
| ITF Women Nishi-Tama | 2018/03/22 03:00 | Mayuka Aikawa v Risa Ushijima | 6-3,2-6,3-6 |
| ITF Women Nishi-Tama | 2018/03/21 02:00 | Ayumi Miyamoto v Risa Ushijima | 6-1,4-6,4-6 |
| ITF Women Toyota | 2018/03/15 03:30 | Risa Ushijima v Ayla Aksu | 4-6,2-6 |
| ITF Women Toyota | 2018/03/14 01:00 | Risa Ushijima v Ryoko Ikeda | 6-2,6-3 |