Stadium: Stadium Round: 28 Ground: Hardcourt outdoor
| WTA San Jose WD | 2018/08/04 04:05 | Kato M / Ninomiya M v Garcia Perez G / Hon P | 6-4,6-2 |
| WTA San Jose WD | 2018/08/02 00:00 | Kato M / Ninomiya M v Frech/Sanchez | 1-6,7-5,10-4 |
| Fed Cup, Groupe Mondial | 2018/04/22 06:50 | Kato M / Ninomiya M v Konta J / Watson H | 3-6,6-3,6-3 |
| ITF Women Canberra WD | 2018/03/23 05:00 | Kato M / Ninomiya M v Hon P / Jakupovic D | 4-6,6-4,7-10 |
| ITF Women Canberra WD | 2018/03/22 03:45 | Kato M / Ninomiya M v Moore J / Perez E | 6-2,6-4 |
| ITF Women Canberra WD | 2018/03/21 03:40 | Kato M / Ninomiya M v Bains N / Kennel K | 6-4,6-1 |
| ITF Women Canberra WD | 2018/03/20 05:00 | Kato M / Ninomiya M v Bai A / Hives Z | 1-6,6-3,10-6 |
| WTA - Dubaï - Doubles Femmes | 2018/02/21 16:00 | Makarova E / Vesnina E v Kato M / Ninomiya M | 6-4,6-1 |