Stadium: Court 9 Round: 26 Ground: Hardcourt indoor
| ITF W25 Funchal WD | 2021/11/16 17:40 | Murta/Vismane v Koshiishi A / Sakatsume H | 6-3,6-2 |
| ITF - W15 Monastir - Doubles Femmes | 2021/05/18 12:30 | Hosogi/Sema v Koshiishi A / Sakatsume H | 6-4,6-4 |
| ITF - W15 Monastir - Doubles Femmes | 2021/05/14 12:30 | Proctor/Ulyashchenko v Koshiishi A / Sakatsume H | 6-1,6-4 |
| ITF - W15 Monastir - Doubles Femmes | 2021/05/12 13:15 | Koshiishi A / Sakatsume H v Hosogi/Sukhotina | 6-1,6-3 |
| ITF - W15 Monastir - Doubles Femmes | 2021/05/06 14:30 | Raggi/Scholl v Koshiishi A / Sakatsume H | 2-6,6-4,11-9 |
| ITF - W15 Monastir - Doubles Femmes | 2021/05/05 13:10 | Koshiishi A / Sakatsume H v Le Bihan K / Noel M | 6-4,7-5 |
| ITF - W15 Monastir - Doubles Femmes | 2021/04/28 12:50 | Le Bihan K / Noel M v Koshiishi A / Sakatsume H | 6-2,6-4 |
| ITF - W15 Antalya - Doubles Femmes | 2021/02/19 09:00 | Koshiishi A / Sakatsume H v Herazo Gonzalez M F / Lizarazo Y | 1-6,7-5,6-10 |