Stadium: Court B Round: 27 Ground: Hardcourt indoor
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2017/03/06 00:30 | Ushijima, Risa v Erina Hayashi | 3-6,5-7 |
| ITF W60 Kyoto | 2020/02/20 02:10 | Kyoka Okamura v Erina Hayashi | 1-6,6-4,4-6 |
| ITF W60 Kyoto | 2020/02/19 04:00 | Haruna Arakawa v Erina Hayashi | 6-2,2-6,6-7 |
| ITF W60 Kyoto | 2020/02/17 08:00 | Erina Hayashi v Yuka Hosoki | 7-6,6-2 |
| ITF W60 Kyoto | 2020/02/17 03:45 | Erina Hayashi v Nishimoto, Megumi | 6-1,6-2 |
| Hong Kong, Simples W-ITF-HKG-01B | 2020/01/09 04:15 | Komardina, Anastasiya v Erina Hayashi | 6-2,6-2 |
| Hong Kong, Simples W-ITF-HKG-01B | 2020/01/08 08:50 | Sofya Lansere v Erina Hayashi | 6-1,5-7,3-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/12/31 02:00 | Erina Hayashi v Hondo, Sakura | 4-6,3-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/12/30 03:00 | Erina Hayashi v Leong, Justine Sophie Kwan Tung | 7-5,6-3 |
| ITF W60 Kyoto | 2020/02/20 04:15 | Mei Yamaguchi v Ushijima, Risa | 6-2,6-7,2-6 |
| ITF W60 Kyoto | 2020/02/19 06:00 | Ushijima, Risa v Arina Rodionova | 6-4,1-6,7-6 |
| Launceston, Singles Qualifying W-ITF-AUS-03A | 2020/02/03 22:55 | Alexandra Bozovic v Ushijima, Risa | 6-1,4-6,6-4 |
| Burnie, Simples W-ITF-AUS-02A | 2020/01/27 23:00 | Ushijima, Risa v Himari Sato | 0-6,2-6 |
| ITF W25 Vero Beach | 2020/01/20 16:00 | Eleana Yu v Ushijima, Risa | 7-5,6-0 |
| ITF W25 Daytona Beach | 2020/01/12 16:00 | Maria Lourdes Carle v Ushijima, Risa | 6-4,6-1 |
| ITF W25 Navi Mumbai | 2019/12/17 09:30 | Ushijima, Risa v Luangnam, Nudnida | 7-5,3-6,2-6 |
| ITF W25 Pune | 2019/12/12 05:30 | Ushijima, Risa v Talbi, Shalimar | 6-7,5-7 |