Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF W60 Kyoto | 2022/12/19 07:00 | Michika Ozeki v Ushijima, Risa | 6-2,6-4 |
| Hamamatsu, Singles W-WITF-JPN-12A | 2018/10/17 01:00 | Ushijima, Risa v Michika Ozeki | 6-3,2-6,6-3 |
| Hua Hin, Singles W-WITF-THA-07A | 2017/07/19 03:00 | Michika Ozeki v Ushijima, Risa | 1-6,6-7 |
| ITF Women Tokyo Qual | 2017/06/05 03:55 | Ushijima, Risa v Michika Ozeki | 6-4,6-4 |
| ITF Women Kurume | 2017/05/16 01:00 | Michika Ozeki v Ushijima, Risa | 3-6,3-6 |
| Jakarta, Singles W-ITF-INA-02A | 2023/03/15 02:30 | Michika Ozeki v Natsuho Arakawa | 6-4,6-4 |
| ITF - W15 Sharm El Sheikh | 2023/02/09 09:50 | Michika Ozeki v Darja Suvirdjonkova | 2-6,7-6,1-6 |
| ITF - W15 Sharm El Sheikh | 2023/02/08 12:30 | Michika Ozeki v Shauha, Darya | 4-6,6-2,7-6 |
| ITF - W15 Sharm El Sheikh | 2023/02/03 07:30 | Michika Ozeki v Klaudija Bubelyte | 5-7,3-6 |
| ITF - W15 Sharm El Sheikh | 2023/02/02 07:30 | Michika Ozeki v Cherry Kim | 6-2,6-1 |
| ITF - W15 Sharm El Sheikh | 2023/02/01 07:30 | Michika Ozeki v Anca Alexia Todoni | 1-6,7-5,6-1 |
| ITF W40 Nonthaburi Qual | 2023/01/08 05:45 | Namigata, Junri v Michika Ozeki | 1-6,6-4,6-4 |
| ITF W40 Nonthaburi | 2023/01/02 04:25 | Daria Kudashova v Michika Ozeki | 4-6,6-3,6-2 |
| Jakarta, Singles W-ITF-INA-02A | 2023/03/15 06:10 | Ushijima, Risa v Takayama, Chihiro | 6-1,3-6,6-3 |
| ITF W60 Kyoto | 2022/12/19 07:00 | Michika Ozeki v Ushijima, Risa | 6-2,6-4 |
| ITF W60 Kyoto | 2022/12/19 03:00 | Kayo Nishimura v Ushijima, Risa | 2-6,2-6 |
| UTR Pro Tennis Series Miki Women | 2022/12/18 00:30 | Ushijima, Risa v Ueda, Ramu | 2-6,3-6 |
| UTR Pro Tennis Series Miki Women | 2022/12/17 02:00 | Ushijima, Risa v Shiho Tsujioka | 6-4,0-6,7-5 |
| UTR Pro Tennis Series Miki Women | 2022/12/16 02:00 | Sako Nakaoka v Ushijima, Risa | 1-6,5-7 |
| UTR Pro Tennis Series Miki Women | 2022/12/15 03:30 | Nanaka Sato v Ushijima, Risa | 0-6,0-6 |
| UTR Pro Tennis Series Miki Women | 2022/12/14 02:00 | Riko Hiroshima v Ushijima, Risa | 1-6,1-6 |