Stadium: Court H Round: 62 Ground: Hardcourt outdoor
| Burnie, Singles Qualifying W-WITF-AUS-01C | 2018/01/27 23:00 | レン,ジア・チ v タカハタ,コトミ | 6-7,6-3,6-1 |
| ITF Women Toyota Qual | 2017/11/12 01:40 | Nishimoto, Megumi v タカハタ,コトミ | 6-3,2-6,6-3 |
| Makinohara, Singles Qualifying W-WITF-JPN-15A | 2017/10/11 00:30 | タカハタ,コトミ v チョン・ナオミ | 0-6,1-6 |
| WTA Dalian Qual | 2017/09/03 06:10 | 桑田 寛子 v タカハタ,コトミ | 6-2,6-0 |
| ITF Women Dunakeszi Qual | 2017/08/26 10:20 | タカハタ,コトミ v サブリナ・サンタマリア | 3-6,2-6 |
| ITF Women Artvin Qual | 2017/08/20 07:00 | ゴザル・アインディノヴァ v タカハタ,コトミ | 7-6,6-1 |
| ITF Women Artvin Qual | 2017/08/19 08:00 | Njoze, Mirabelle v タカハタ,コトミ | 1-6,1-6 |
| ITF Women Anning | 2017/07/04 01:30 | タカハタ,コトミ v Jiaying He | 6-7,0-6 |
| Hamamatsu, Singles Qualifying W-C25-JPN-06A | 2017/10/17 06:00 | Haraguchi, Sae v V.V Mei | 1-6,0-6 |
| Hamamatsu, Singles Qualifying W-C25-JPN-06A | 2017/10/14 01:00 | 尾関 彩花 尾関 彩花 v Haraguchi, Sae | 2-6,6-4,3-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/12 03:20 | ミカエラ・ハート v Haraguchi, Sae | 6-1,6-3 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/11 01:00 | Haraguchi, Sae v ヒサマツ,シホ | 6-1,3-6,6-0 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/03/25 03:30 | Haraguchi, Sae v 小関 みちか | 1-6,4-6 |