Stadium: Court 3 Round: 44
| Kofu, Singles W-WITF-JPN-02A | 2018/06/14 03:50 | Doi, Misaki v Takahata, Kotomi | 6-3,6-2 |
| Kofu, Singles W-WITF-JPN-02A | 2018/06/12 01:00 | Takahata, Kotomi v Berezov, Anastasia | 6-3,7-5 |
| ITF Women Changsha | 2018/06/05 06:00 | Lin Zhu v Takahata, Kotomi | 6-0,6-0 |
| ITF Women Changsha Qual | 2018/06/03 04:15 | Takahata, Kotomi v Yu, Yue | 6-2,6-4 |
| ITF Women Changsha Qual | 2018/06/02 04:55 | Takahata, Kotomi v Li, Denglin | 6-1,6-3 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 05:15 | Takahata, Kotomi v Muhammad, Asia | 4-6,2-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/22 02:20 | Yuka Hosoki v Takahata, Kotomi | 4-6,3-6 |
| ITF Women Kurume Qual | 2018/05/14 03:10 | Chiang, Yuki Kristina v Takahata, Kotomi | 6-4,4-6,7-6 |
| ITF Women Daegu Qual | 2018/06/17 04:30 | Da Ye Kim v Ahn, Yu Jin | 6-0,5-7,3-6 |
| ITF Women Sangju | 2018/06/05 03:50 | Yoshitomi, Aiko v Ahn, Yu Jin | 6-1,6-1 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/20 02:00 | Ahn, Yu Jin v Kim, Da Hye | 2-6,7-5,0-6 |
| ITF Women Incheon Qual | 2018/05/14 02:00 | Ya-Hsuan Lee v Ahn, Yu Jin | 6-3,6-1 |
| ITF Women Incheon Qual | 2018/05/13 01:00 | Sul, You-Na v Ahn, Yu Jin | 4-6,3-6 |
| ITF Women Goyang Qual | 2018/05/08 01:00 | Ahn, Yu Jin v Kang, Seo-Kyung | 4-6,2-6 |
| ITF Women Goyang Qual | 2018/05/07 00:30 | Maddison Inglis v Ahn, Yu Jin | 4-6,5-7 |
| ITF Women Goyang Qual | 2018/05/06 05:15 | Ahn, Yu Jin v Yun, Hyeran | 6-0,6-4 |