Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF Women Karuizawa Qual | 2018/05/21 02:40 | 혼도, 사쿠라 v Takahashi, Reina | 6-1,5-7,6-1 |
| ITF Women Karuizawa Qual | 2018/05/20 04:00 | 케즈카, 치에 v Takahashi, Reina | 6-3,1-6,3-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 03:00 | Takahashi, Reina v 아키타, 시호 | 4-6,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/21 05:35 | Takahashi, Reina v Fujiwara, Rika | 6-7,7-6,3-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Itaya, Rion v Takahashi, Reina | 6-3,6-4 |
| Tokyo, Singles Qualifying W-C100-JPN-01A | 2017/11/05 03:00 | Takahashi, Reina v 아라카와 H, 하루나 | 1-6,2-6 |
| Tokyo, Singles Qualifying W-C100-JPN-01A | 2017/11/04 04:15 | Takahashi, Reina v 푸루야, 미치루 | 6-2,6-3 |
| Hamamatsu, Singles Qualifying W-C25-JPN-06A | 2017/10/16 03:30 | Takahashi, Reina v 수토, 미나미 | 4-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/09 00:00 | Nishida, Nao v Abe, Arisa | 6-2,4-6,6-1 |
| ITF Women Kashiwa Qual | 2018/04/01 03:00 | Nishida, Nao v 이, 야수안 | 1-6,0-6 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2018/03/04 02:30 | Nishida, Nao v Chiang, Yuki Kristina | 4-6,6-7 |
| Hamamatsu, Singles Qualifying W-C25-JPN-06A | 2017/10/14 01:00 | Nishida, Nao v 가나하, 마코 | 6-7,3-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/11 00:00 | 카지, 하루카 v Nishida, Nao | 6-1,5-7,6-2 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2017/03/18 01:00 | Kanai, Ayaka v Nishida, Nao | 4-6,7-5,7-6 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2017/03/06 00:30 | Kitagawa, Rio v Nishida, Nao | 5-7,6-2,6-1 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2017/03/05 00:30 | Nishida, Nao v Fujioka, Nozomi | 6-4,6-2 |