Stadium: Court 3 Round: 44
| ITF Women Burnie Qual | 2018/01/27 23:00 | Jia Qi Ren v Kotomi Takahata | 6-7,6-3,6-1 |
| ITF Women Toyota Qual | 2017/11/12 01:40 | Megumi Nishimoto v Kotomi Takahata | 6-3,2-6,6-3 |
| ITF Women Makinohara | 2017/10/11 00:30 | Kotomi Takahata v Naomi Cheong | 0-6,1-6 |
| WTA Dalian Qual | 2017/09/03 06:10 | Hiroko Kuwata v Kotomi Takahata | 6-2,6-0 |
| ITF Women Dunakeszi Qual | 2017/08/26 10:20 | Kotomi Takahata v Sabrina Santamaria | 3-6,2-6 |
| ITF Women Artvin Qual | 2017/08/20 07:00 | Gozal Ainitdinova v Kotomi Takahata | 7-6,6-1 |
| ITF Women Artvin Qual | 2017/08/19 08:00 | Mirabelle Njoze v Kotomi Takahata | 1-6,1-6 |
| ITF Women Anning | 2017/07/04 01:30 | Kotomi Takahata v Jiaying He | 6-7,0-6 |
| 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 |
| ITF Women Yeongwol | 2017/09/06 01:00 | Yu Jin Ahn v Dabin Oh | 6-4,6-4 |
| ITF Women Gimcheon | 2017/06/13 05:15 | So Hee Jung v Yu Jin Ahn | 0-6,6-2,7-6 |
| ITF Women Gimcheon | 2017/06/05 02:00 | Yu Jin Ahn v Se Jin Lee | 1-6,4-6 |
| ITF Women Sangju | 2017/06/02 01:30 | Yu Jin Ahn v Ji-Hee Choi | 2-6,2-6 |
| ITF Women Sangju | 2017/06/01 05:15 | Mizuno Kijima v Yu Jin Ahn | 6-3,2-6,3-6 |
| ITF Women Sangju | 2017/06/01 01:00 | Mizuno Kijima v Yu Jin Ahn | 6-3,2-6,3-5 |