Stadium: Court 7 Round: 44
| ITF Women Kashiwa Qual | 2017/04/02 04:00 | Takahata, Kotomi v Hong, Seung-Yeon | 6-4,6-3 |
| ITF Women Daegu Qual | 2018/06/18 03:30 | Takahata, Kotomi v Ahn, Yu Jin | 6-1,6-4 |
| 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 Incheon Qual | 2018/05/13 01:00 | Zhibek Kulambayeva v Hong, Seung-Yeon | 6-3,6-4 |
| ITF Women Goyang Qual | 2018/05/08 01:00 | Silich, Alina v Hong, Seung-Yeon | 6-4,6-4 |
| ITF Women Yeongwol | 2017/09/09 02:00 | Hong, Seung-Yeon v Kim, Na Ri | 2-6,0-6 |
| ITF Women Yeongwol | 2017/09/07 03:40 | Hong, Seung-Yeon v Sul, You-Na | 6-1,6-4 |
| ITF Women Yeongwol | 2017/09/05 02:00 | Hong, Seung-Yeon v Walters, Alexandra | 6-1,6-0 |
| ITF Women Gimcheon | 2017/06/16 02:00 | Hong, Seung-Yeon v Han, Sung-Hee | 6-4,1-6,5-7 |
| ITF Women Gimcheon | 2017/06/15 03:15 | Hong, Seung-Yeon v Yea, Hyojung | 6-0,6-3 |
| ITF Women Gimcheon | 2017/06/13 01:00 | Hong, Seung-Yeon v Jeong, Yeong Won | 5-7,6-4,7-5 |