Round: 62 Ground: Synthetic outdoor
| ITF Women Hamamatsu | 2018/10/14 01:00 | Chihiro Takayama v Ari Matsumoto | 2-6,2-6 |
| ITF Women Makinohara | 2018/10/10 02:25 | Ari Matsumoto v Miharu Imanishi | 4-6,2-6 |
| ITF Women Makinohara | 2018/10/08 02:45 | Ari Matsumoto v Sakura Hosogi | 7-5,6-1 |
| ITF Women Makinohara | 2018/10/07 03:00 | Ari Matsumoto v Yui Chikaraishi | 6-3,6-3 |
| ITF Women Kofu | 2018/06/13 02:45 | Ari Matsumoto v Kai-Chen Chang | 2-6,6-7 |
| ITF Women Karuizawa | 2018/05/24 02:40 | Miyabi Inoue v Ari Matsumoto | 6-4,6-2 |
| ITF Women Karuizawa | 2018/05/22 02:35 | Chisa Hosonuma v Ari Matsumoto | 5-7,2-6 |
| ITF Women Karuizawa Qual | 2018/05/21 01:00 | Alexandra Riley v Ari Matsumoto | 0-6,4-6 |