| ITF Women Nanao | 2018/08/26 01:00 | 카지타니, 로부 v 야마자키, 이쿠미 | 6-2,1-6,3-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/21 03:00 | 장, 카이린 v So, Kumi | 6-2,7-5 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/20 01:00 | 사이고, 리나 v So, Kumi | 3-6,1-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 03:00 | So, Kumi v 타카하타, 코토미 | 6-4,6-4 |
| ITF Women Figueira Da Foz Qual | 2018/07/16 12:00 | 부스카, 크리스티나 v So, Kumi | 6-1,6-0 |
| ITF Women Setubal Qual | 2018/07/08 13:00 | 윌리포드, 켈리 v So, Kumi | 2-6,6-7 |
| ITF Women Corroios-Seixal | 2018/07/05 11:00 | 실바, 에덴 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 시마노비치, 이리나 | 4-6,4-6 |