Stadium: Court 7 Round: 25
| ITF Women Karuizawa | 2018/05/22 01:00 | Tammi Patterson v Aiko Yoshitomi | 6-4,6-4 |
| ITF Women Kurume Qual | 2018/05/15 01:00 | Abbie Myers v Aiko Yoshitomi | 6-1,7-6 |
| ITF Women Kurume Qual | 2018/05/13 07:00 | Aiko Yoshitomi v Ramu Ueda | 6-3,6-3 |
| ITF Women Fukuoka | 2018/05/09 05:35 | Su Jeong Jang v Aiko Yoshitomi | 6-1,6-2 |
| ITF Women Fukuoka Qual | 2018/05/08 01:00 | Olivia Tjandramulia v Aiko Yoshitomi | 6-2,6-3 |
| ITF Women Fukuoka Qual | 2018/05/07 01:00 | Aiko Yoshitomi v Utaka Kishigami | 6-1,7-6 |
| ITF Women Fukuoka Qual | 2018/05/06 02:20 | Aiko Yoshitomi v Chihiro Takayama | 6-2,6-3 |
| ITF Women Gifu Qual | 2018/04/29 09:40 | Aiko Yoshitomi v Makoto Ninomiya | 4-6,1-6 |
| ITF Women Changwon Qual | 2018/05/20 02:00 | Yu Jin Ahn v Da Hye Kim | 2-6,7-5,0-6 |
| ITF Women Incheon Qual | 2018/05/14 02:00 | Ya-Hsuan Lee v Yu Jin Ahn | 6-3,6-1 |
| ITF Women Incheon Qual | 2018/05/13 01:00 | You-Na Sul v Yu Jin Ahn | 4-6,3-6 |
| ITF Women Goyang Qual | 2018/05/08 01:00 | Yu Jin Ahn v Seo-Kyung Kang | 4-6,2-6 |
| ITF Women Goyang Qual | 2018/05/07 00:30 | Maddison Inglis v Yu Jin Ahn | 4-6,5-7 |
| ITF Women Goyang Qual | 2018/05/06 05:15 | Yu Jin Ahn v Hyeran Yun | 6-0,6-4 |
| WTA Seoul Qual | 2017/09/16 03:15 | Yu Jin Ahn v Katy Dunne | 5-7,1-6 |
| ITF Women Yeongwol | 2017/09/07 03:10 | Ya-Hsuan Lee v Yu Jin Ahn | 6-2,6-2 |