Stadium: Court 3 Round: 54 Ground: Synthetic outdoor
| ITF W25 Karuizawa | 2019/05/23 01:00 | Ari Matsumoto v Jovana Jaksic | 1-6,1-6 |
| ITF W25 Karuizawa | 2019/05/22 01:00 | Anri Nagata v Ari Matsumoto | 1-6,1-6 |
| ITF W25 Karuizawa | 2019/05/21 05:40 | Ari Matsumoto v Ayaka Okuno | 4-6,6-2,10-7 |
| ITF W25 Karuizawa | 2019/05/20 03:00 | Ari Matsumoto v Momoko Nagato | 7-5,6-1 |
| ITF W60 Kurume | 2019/05/13 00:30 | Mana Ayukawa v Ari Matsumoto | 6-2,6-2 |
| ITF W25 Osaka | 2019/04/09 04:05 | Ari Matsumoto v Pranjala Yadlapalli | 6-3,5-7,0-6 |
| ITF W25 Osaka | 2019/04/08 04:35 | So-Ra Lee v Ari Matsumoto | 6-2,5-7,7-10 |
| ITF W25 Kofu | 2019/03/27 01:00 | Ari Matsumoto v Sandra Samir | 2-6,1-6 |
| Full List | 2019/05/07 07:15 | Honoka Kobayashi v Diana Khodan | 4-6,5-7 |
| ITF W15 Antalya | 2019/05/04 07:45 | Indy De Vroome v Honoka Kobayashi | 6-3,2-6,6-2 |
| ITF W15 Antalya | 2019/05/03 07:45 | Daria Nazarkina v Honoka Kobayashi | 3-6,0-6 |
| ITF W15 Antalya | 2019/05/02 10:30 | Carmen Schultheiss v Honoka Kobayashi | 4-6,4-6 |
| ITF W15 Antalya | 2019/05/01 13:50 | Honoka Kobayashi v Noa Liauw A Fong | 2-6,7-5,6-1 |
| ITF W15 Antalya | 2019/04/30 07:15 | Honoka Kobayashi v Viktoriya Gogol | 6-4,7-5 |
| ITF W15 Antalya | 2019/04/25 07:30 | Nana Kawagishi v Honoka Kobayashi | 6-2,6-4 |
| ITF W15 Antalya | 2019/04/24 10:55 | Honoka Kobayashi v Anastasia Petrova | 6-3,6-2 |