Stadium: Court 10 Round: 54 Ground: Grass
| Karuizawa, Singles W-ITF-JPN-12A | 2019/05/20 03:00 | Matsumoto, Ari v Nagato, Momoko | 7-5,6-1 |
| Kurume, Singles W-ITF-JPN-11A | 2019/05/13 00:30 | Mana Ayukawa v Matsumoto, Ari | 6-2,6-2 |
| Osaka, Singles W-ITF-JPN-02A | 2019/04/09 04:05 | Matsumoto, Ari v Yadlapalli, Pranjala | 6-3,5-7,0-6 |
| Osaka, Singles W-ITF-JPN-02A | 2019/04/08 04:35 | Lee, So-Ra v Matsumoto, Ari | 6-2,5-7,7-10 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2019/03/27 01:00 | Matsumoto, Ari v Sandra Samir | 2-6,1-6 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2019/03/19 01:00 | Ayano Shimizu v Matsumoto, Ari | 6-3,6-1 |
| ITF - W15 Antalya | 2019/02/21 08:50 | Ho, Jessica v Matsumoto, Ari | 6-4,6-2 |
| ITF - W15 Antalya | 2019/02/19 07:00 | Matsumoto, Ari v Corneanu , Oana Smaranda | 6-0,7-6 |
| Karuizawa, Singles W-ITF-JPN-12A | 2019/05/20 03:00 | Hisamatsu, Shiho v Okuno, Ayaka | 4-6,2-6 |
| Kurume, Singles W-ITF-JPN-11A | 2019/05/13 01:55 | Alexandra Bozovic v Okuno, Ayaka | 6-3,6-3 |
| Fukuoka, Singles W-ITF-JPN-10A | 2019/05/06 03:05 | Okuno, Ayaka v Leonie Kung | 3-6,3-6 |
| Charlottesville, Simples W-ITF-USA-13A | 2019/04/23 16:20 | Emily Fanning v Okuno, Ayaka | 4-6,6-2,10-3 |
| Charlottesville, Simples W-ITF-USA-13A | 2019/04/22 14:00 | Cavero Roeper, Ana Jocelijn v Okuno, Ayaka | 0-6,2-6 |
| Osaka, Singles W-ITF-JPN-02A | 2019/04/08 01:00 | Okuno, Ayaka v Ueda, Ramu | 3-6,2-6 |
| Kashiwa, Qualifications Simples W-ITF-JPN-07A | 2019/04/02 00:00 | Okuno, Ayaka v Mana Ayukawa | 2-6,4-6 |
| Kashiwa, Qualifications Simples W-ITF-JPN-07A | 2019/04/01 03:00 | Okuno, Ayaka v Nagato, Momoko | 6-4,6-3 |