| ITF Women Kurume Qual | 2017/05/15 01:00 | Rika Fujiwara v Kei Kato | 6-0,7-6 |
| ITF Women Kurume Qual | 2017/05/14 07:50 | Hina Matsumoto v Kei Kato | 3-6,4-6 |
| ITF Women Kurume Qual | 2017/05/14 05:15 | Робу Кажитани v Kei Kato | 3-6,6-7 |
| ITF Women Kofu Qual | 2017/03/27 04:00 | Kei Kato v Mari Osaka | 0-6,1-6 |
| ITF Women Kofu Qual | 2017/03/27 02:30 | Kumi So v Kei Kato | 2-6,6-7 |
| ITF Women Kofu Qual | 2017/03/25 01:00 | Kimika Sakata v Kei Kato | 4-6,3-6 |
| ITF Women Nishi-Tama | 2017/03/20 01:00 | Kei Kato v Rika Fujiwara | 3-6,0-6 |
| ITF Women Nishi-Tama | 2017/03/19 01:00 | Чихиро Такаяма v Kei Kato | 1-6,2-6 |
| ITF Women Karuizawa Qual | 2017/05/20 04:00 | Ran Miyachi v Сара Панг | 6-3,6-4 |
| ITF Women Hamamatsu Qual | 2016/10/15 03:00 | Харуна Аракава v Ran Miyachi | 6-0,6-0 |