| ITF W25 Leiria | 09/08 16:10 | 25 | [325] Olivia Gadecki v Risa Ushijima [479] | 6-0,6-0 | |
| ITF W25 Porto | 06/23 09:30 | 25 | Olga Helmi v Risa Ushijima | 6-0,6-1 | |
| ITF W25 Figueira da Foz | 06/15 12:25 | 25 | [332] Ayano Shimizu v Risa Ushijima [400] | 6-2,6-0 | |
| ITF W25 Montemor-o-Novo | 06/09 09:00 | 25 | [348] Maria G Carrasco v Risa Ushijima [394] | 6-3,6-1 | |
| ITF W15 Monastir | 03/24 09:55 | 25 | Risa Ushijima v Angelica Raggi | 3-6,0-6 | |
| ITF W15 Monastir | 03/16 08:30 | 25 | [292] Chiara Scholl v Risa Ushijima [388] | 3-6,6-4,6-4 | |
| ITF W15 Monastir | 03/09 13:00 | 25 | Ana L De La Nuez v Risa Ushijima | 7-6,6-4 | |
| ITF W15 Monastir | 03/05 13:05 | 27 | Sinja Kraus v Risa Ushijima | 6-4,7-5 | |
| ITF W15 Monastir | 03/04 09:30 | 26 | Katharina Hering v Risa Ushijima | 6-7,3-6 | |
| ITF W15 Monastir | 03/03 08:30 | 25 | Merel Hoedt v Risa Ushijima | 4-6,1-6 | |
| ITF W15 Monastir | 02/26 08:30 | 27 | Risa Ushijima v Francesca Curmi | 4-6,1-6 | |
| ITF W15 Monastir | 02/25 09:30 | 26 | Risa Ushijima v Yasmine Mansouri | 6-4,7-5 | |
| ITF W15 Monastir | 02/24 08:00 | 25 | Risa Ushijima v Olivia Gram | 6-1,6-4 | |
| ITF W25 Yokohama | 03/03 08:10 | 25 | [361] Risa Ushijima v Kyoka Okamura [239] | 2-6,3-6 | |
| ITF W60 Kyoto | 02/21 01:00 | 27 | [369] Erina Hayashi v Risa Ushijima [391] | 6-0,6-2 | |
| ITF W60 Kyoto | 02/20 04:15 | 26 | Mei Yamaguchi v Risa Ushijima | 6-2,6-7,2-6 | |
| ITF W60 Kyoto | 02/19 06:00 | 25 | [391] Risa Ushijima v Arina Rodionova [151] | 6-4,1-6,7-6 | |
| ITF W25 Launceston | 02/03 22:55 | 25 | [485] Alexandra Bozovic v Risa Ushijima [388] | 6-1,4-6,6-4 | |
| ITF W60 Burnie | 01/27 23:00 | 54 | Risa Ushijima v Himari Sato | 0-6,2-6 | |
| ITF W25 Vero Beach | 01/20 16:00 | 54 | Eleana Yu v Risa Ushijima | 7-5,6-0 | |
| ITF W25 Daytona Beach | 01/12 16:00 | 44 | Maria Lourdes Carle v Risa Ushijima | 6-4,6-1 | |
| ITF W25 Navi Mumbai | 12/17 09:30 | 25 | [409] Risa Ushijima v Nudnida Luangnam [359] | 7-5,3-6,2-6 | |
| ITF W25 Pune | 12/12 05:30 | 26 | [408] Risa Ushijima v Shalimar Talbi [471] | 6-7,5-7 | |
| ITF W25 Pune | 12/10 05:00 | 25 | [237] Ekaterina Yashina v Risa Ushijima [408] | 4-6,5-7 | |
| ITF W15 Nonthaburi | 12/04 07:00 | 25 | Risa Ushijima v Kamonwan Buayam | 2-6,2-6 | |
| ITF W100 Tokyo | 11/13 01:00 | 25 | [164] Natalija Kostic v Risa Ushijima [413] | 6-2,6-4 | |
| ITF W100 Tokyo | 11/11 06:30 | 45 | [412] Risa Ushijima v Makoto Ninomiya [64] | 7-6,4-6,4-10 | |
| ITF W100 Tokyo | 11/11 02:40 | 45 | [412] Risa Ushijima v Miyu Kato [79] | 7-5,6-1 | |
| ITF W25 Hamamatsu | 10/17 01:00 | 26 | [453] Risa Ushijima v Kanako Morisaki [249] | 2-6,2-6 | |
| ITF W25 Hamamatsu | 10/16 01:00 | 25 | [453] Risa Ushijima v Mana Ayukawa [414] | 7-5,6-2 |