Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| WTA Indian Wells WD | 2019/03/08 19:00 | Kato/Ninomiya v Atawo/Srebotnik | 3-6,1-6 |
| WTA Dubai WD | 2019/02/19 11:15 | Kato/Ninomiya v Hsieh/Strycova | 3-6,2-6 |
| WTA Dubai 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 Hua Hin WD | 2019/01/30 09:00 | Kato/Ninomiya v Blinkova/Wang | 2-6,2-6 |
| Australian Open Women WD | 2019/01/16 00:00 | Hibino/Krawczyk v Kato/Ninomiya | 3-6,6-4,6-3 |
| WTA Sydney WD | 2019/01/10 04:25 | Krunic/Siniakova v Kato/Ninomiya | 7-5,6-2 |