Round: 62 Ground: Synthetic outdoor
| ITF Women Nanao | 2018/08/26 01:00 | Kajitani, Robu v Ikumi Yamazaki | 6-2,1-6,3-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/21 03:00 | Zhang, Kai Lin v So, Kumi | 6-2,7-5 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/20 01:00 | Rina Saigo v So, Kumi | 3-6,1-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 03:00 | So, Kumi v Takahata, Kotomi | 6-4,6-4 |
| ITF Women Figueira Da Foz Qual | 2018/07/16 12:00 | Cristina Bucsa v So, Kumi | 6-1,6-0 |
| ITF Women Setubal Qual | 2018/07/08 13:00 | Kelly Williford v So, Kumi | 2-6,6-7 |
| ITF Women Corroios-Seixal | 2018/07/05 11:00 | Eden Silva v So, Kumi | 6-2,6-3 |
| ITF Women Corroios-Seixal | 2018/07/03 11:30 | Fayol, Clemence v So, Kumi | 6-2,4-6,3-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/04/10 08:00 | So, Kumi v Iryna Shymanovich | 4-6,4-6 |