Estadio: Court 2 Round: 26 Ground: Clay
| ITF W80 Palm Harbor | 2019/04/02 19:25 | Mari Osaka v Urszula Radwanska | 6-1,7-6 |
| WTA Miami | 2019/03/21 16:25 | Whitney Osuigwe v Mari Osaka | 6-2,6-4 |
| ITF W100 Midland | 2019/01/28 20:40 | Emina Bektas v Mari Osaka | 6-1,6-4 |
| WTA Newport Beach | 2019/01/22 18:00 | Mari Osaka v Katie Volynets | 0-6,0-6 |
| ITF Toronto - Femenino | 2018/10/31 15:20 | Bianca Andreescu v Mari Osaka | 6-1,6-1 |
| ITF Florence - Femenino | 2018/10/21 17:00 | Mari Osaka v Bianca Andreescu | 4-6,6-2,3-6 |
| ITF Florence - Femenino | 2018/10/20 17:55 | Katie Volynets v Mari Osaka | 2-6,6-4,3-6 |
| ITF Florence - Femenino | 2018/10/19 14:00 | Mari Osaka v Paula Cristina Goncalves | 5-7,6-4,6-1 |
| ITF W80 Palm Harbor | 2019/04/02 20:40 | Usue Maitane Arconada v Kurumi Nara | 4-6,6-4,2-6 |
| ITF W60 Kioto | 2019/02/22 02:00 | Ylena In-Albon v Kurumi Nara | 6-4,7-6 |
| ITF W60 Kioto | 2019/02/21 04:40 | Mai Hontama v Kurumi Nara | 6-3,6-7,3-6 |
| ITF W60 Kioto | 2019/02/20 04:10 | Su Jeong Jang v Kurumi Nara | 6-4,4-6,4-6 |
| 2019 Fed Cup | 2019/02/10 03:00 | Kurumi Nara v Silvia Soler-Espinosa | 7-6,6-4 |
| WTA Hua Hin | 2019/01/27 05:00 | Jennifer Brady v Kurumi Nara | 6-1,6-2 |
| WTA Hua Hin | 2019/01/26 05:00 | Fang Ying Xun v Kurumi Nara | 4-6,0-6 |
| ITF 25 Singapur - Femenino | 2019/01/18 05:00 | Kurumi Nara v Conny Perrin | 5-7,5-7 |