Stadium: Court 13 Round: 25 Ground: Hardcourt outdoor
| ITF Women Makinohara Qual | 2017/10/09 02:10 | Reina Takahashi v Mitsumi Kawasaki | 6-3,6-3 |
| ITF Women Kofu Qual | 2018/03/24 03:00 | Reina Takahashi v Shiho Akita | 4-6,1-6 |
| ITF Women Nishi-Tama | 2018/03/21 05:35 | Reina Takahashi v Rika Fujiwara | 6-7,7-6,3-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Rion Itaya v Reina Takahashi | 6-3,6-4 |
| ITF Women Tokyo Qual | 2017/11/05 03:00 | Reina Takahashi v Haruna Arakawa | 1-6,2-6 |
| ITF Women Tokyo Qual | 2017/11/04 04:15 | Reina Takahashi v Michiru Furuya | 6-2,6-3 |
| ITF Women Hamamatsu Qual | 2017/10/16 03:30 | Reina Takahashi v Minami Shuto | 4-6,1-6 |
| ITF Women Hamamatsu Qual | 2017/10/14 01:00 | Arisa Abe v Reina Takahashi | 3-6,6-2,2-6 |
| ITF Women Makinohara | 2017/10/10 00:30 | Miyabi Inoue v Reina Takahashi | 6-3,4-6,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 04:15 | Mitsumi Kawasaki v Abbie Myers | 1-6,2-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Hiroko Kuwata v Mitsumi Kawasaki | 6-0,7-6 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Rebecca Marino v Mitsumi Kawasaki | 6-1,6-4 |
| ITF Women Kofu Qual | 2018/03/25 02:30 | Erika Sema v Mitsumi Kawasaki | 6-0,6-2 |
| ITF Women Kofu Qual | 2018/03/24 03:00 | Chinatsu Shimizu v Mitsumi Kawasaki | 3-6,6-4,2-6 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Mitsumi Kawasaki v Chisa Hosonuma | 6-1,4-6,2-6 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Mitsumi Kawasaki v Yumeko Yoshitomi | 6-1,6-0 |
| ITF Women Nishi-Tama | 2018/03/17 03:00 | Mitsumi Kawasaki v Shiho Shibata | 7-5,7-5 |