Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| WTA Sydney WD | 2019/01/08 02:00 | Kato M / Ninomiya M v Aoyama S / Marozava L | 6-3,6-4 |
| WTA Guadalajara WD | 2019/03/15 00:00 | Kato M / Ninomiya M v Sanchez M / Stollar F | 3-6,5-7 |
| WTA Guadalajara WD | 2019/03/14 01:25 | Kato M / Ninomiya M v Fichman S / Jani R-L | 6-4,3-6,10-4 |
| WTA Guadalajara WD | 2019/03/13 02:45 | Kato M / Ninomiya M v Arruabarrena/Kania | 6-2,4-6,10-6 |
| WTA - Indian Wells - Doubles Femmes | 2019/03/08 19:00 | Kato M / Ninomiya M v Atawo R / Srebotnik K | 3-6,1-6 |
| WTA - Dubaï - Doubles Femmes | 2019/02/19 11:15 | Kato M / Ninomiya M v Hsieh / Strycova | 3-6,2-6 |
| WTA - Dubaï - Doubles Femmes | 2019/02/17 09:45 | Han X / Niculescu M v Kato M / Ninomiya M | 3-6,1-6 |
| WTA - Doha - Doubles Femmes | 2019/02/13 16:00 | Groenefeld A L / Schuurs D v Kato M / Ninomiya M | 6-4,6-3 |
| Fed Cup, Groupe Mondial | 2019/02/10 07:20 | Kato M / Ninomiya M v Garcia Perez G / Martinez Sanchez M | 1-6,3-6 |
| WTA - Indian Wells - Doubles Femmes | 2019/03/09 01:45 | Aoyama S / Marozava L v Chan H-C / Chan L | 2-6,3-6 |
| WTA - Dubaï - Doubles Femmes | 2019/02/18 08:00 | Aoyama S / Marozava L v Kuzmova V / Tomljanovic A | 5-7,6-7 |
| WTA - Doha - Doubles Femmes | 2019/02/12 16:00 | Chan H-C / Chan L v Aoyama S / Marozava L | 7-6,7-5 |
| WTA St. Petersburg WD | 2019/01/30 12:00 | Danilovic O / Krunic A v Aoyama S / Marozava L | 6-4,6-4 |
| Open d'Australie - Double Femmes | 2019/01/18 03:00 | Aoyama S / Marozava L v Christian K / Muhammad A | 5-7,5-7 |
| Open d'Australie - Double Femmes | 2019/01/16 00:00 | Groenefeld A L / King V v Aoyama S / Marozava L | 4-6,3-6 |
| WTA Sydney WD | 2019/01/08 02:00 | Kato M / Ninomiya M v Aoyama S / Marozava L | 6-3,6-4 |
| WTA Shenzhen WD | 2019/01/02 04:30 | Aoyama S / Marozava L v Hibino N / Kalinina A | 2-6,7-6,4-10 |