Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| WTA Sydney - WD | 2019/01/08 02:00 | Kato/Ninomiya v Aoyama/Marozava | 6-3,6-4 |
| WTA Guadalajara - WD | 2019/03/15 00:00 | Kato/Ninomiya v Sanchez/Stollar | 3-6,5-7 |
| WTA Guadalajara - WD | 2019/03/14 01:25 | Kato/Ninomiya v Fichman/Jani | 6-4,3-6,10-4 |
| WTA Guadalajara - WD | 2019/03/13 02:45 | Kato/Ninomiya v Arruabarrena/Kania | 6-2,4-6,10-6 |
| WTA Indian Wells - WD | 2019/03/08 19:00 | Kato/Ninomiya v Atawo/Srebotnik | 3-6,1-6 |
| WTA Dubaj - WD | 2019/02/19 11:15 | Kato/Ninomiya v Hsieh/Strycova | 3-6,2-6 |
| WTA Dubaj - WD | 2019/02/17 09:45 | Han/Niculescu v Kato/Ninomiya | 3-6,1-6 |
| WTA Doha - WD | 2019/02/13 16:00 | Groenefeld/Schuurs v Kato/Ninomiya | 6-4,6-3 |
| 2019 Fed Cup | 2019/02/10 07:20 | Kato/Ninomiya v Garcia-Perez/Martinez Sanchez | 1-6,3-6 |
| WTA Indian Wells - WD | 2019/03/09 01:45 | Aoyama/Marozava v Chan/Chan | 2-6,3-6 |
| WTA Dubaj - WD | 2019/02/18 08:00 | Aoyama/Marozava v Kuzmova/Tomljanovic | 5-7,6-7 |
| WTA Doha - WD | 2019/02/12 16:00 | Chan/Chan v Aoyama/Marozava | 7-6,7-5 |
| WTA St Petersburg - WD | 2019/01/30 12:00 | Danilovic/Krunic v Aoyama/Marozava | 6-4,6-4 |
| Australian Open - Kobiety - WD | 2019/01/18 03:00 | Aoyama/Marozava v Christian/Muhammad | 5-7,5-7 |
| Australian Open - Kobiety - WD | 2019/01/16 00:00 | Groenefeld/King v Aoyama/Marozava | 4-6,3-6 |
| WTA Sydney - WD | 2019/01/08 02:00 | Kato/Ninomiya v Aoyama/Marozava | 6-3,6-4 |
| WTA Shenzhen - WD | 2019/01/02 04:30 | Aoyama/Marozava v Hibino/Kalinina | 2-6,7-6,4-10 |