Round: 25 Ground: Hardcourt outdoor
| ITF Women Nishi-Tama | 2017/03/20 01:00 | Ayumi Koshiishi v Eri Shimizu | 6-3,7-5 |
| ITF Women Nishi-Tama | 2017/03/19 02:00 | Ayumi Koshiishi v Robu Kajitani | 1-6,6-0,6-3 |
| ITF Women Nishi-Tama | 2017/03/18 03:00 | Nina Stadler v Ayumi Koshiishi | 6-0,6-7,3-6 |
| ITF Women Yokohama Qual | 2017/03/05 06:00 | Haruka Kaji v Ayumi Koshiishi | 4-6,6-1,6-4 |
| ITF Women Toyota Qual | 2016/11/13 08:50 | Na Ri Kim v Ayumi Koshiishi | 7-5,3-6,6-3 |
| ITF Women Toyota Qual | 2016/11/13 02:10 | Sari Baba v Ayumi Koshiishi | 6-7,2-6 |
| ITF Women Makinohara | 2016/10/11 00:30 | Miharu Imanishi v Ayumi Koshiishi | 6-3,6-4 |
| ITF Women Makinohara Qual | 2016/10/10 02:00 | Ayumi Koshiishi v Natsumi Chimura | 6-2,6-2 |
| ITF Women Yokohama Qual | 2017/03/06 00:30 | Risa Ushijima v Erina Hayashi | 3-6,5-7 |
| ITF Women Yokohama Qual | 2017/03/05 03:00 | Risa Ushijima v Mitsumi Kawasaki | 6-3,6-0 |
| ITF Women Perth Qual | 2017/02/19 02:00 | Harriet Dart v Risa Ushijima | 6-1,6-2 |
| ITF Women Perth Qual | 2017/02/12 05:00 | Yuxuan Zhang v Risa Ushijima | 6-4,6-2 |
| ITF Women Perth Qual | 2017/02/11 02:00 | Jessy Rompies v Risa Ushijima | 4-6,3-6 |
| ITF Women Tokyo Qual | 2016/11/05 06:30 | Risa Ushijima v Junri Namigata | 2-6,3-6 |
| ITF Women Hamamatsu | 2016/10/21 01:30 | Risa Ushijima v Haruna Arakawa | 3-6,6-4,0-6 |
| ITF Women Hamamatsu | 2016/10/20 03:05 | Jana Fett v Risa Ushijima | 4-6,0-6 |