Round: 25 Ground: Hardcourt outdoor
| ITF Women Nishi-Tama | 2017/03/22 05:55 | Ayumi Koshiishi v Risa Ushijima | 1-6,1-6 |
| ITF Women Tokyo Qual | 2017/11/04 04:20 | Haruna Arakawa v Risa Ushijima | 6-4,6-4 |
| ITF Women Hua Hin | 2017/07/24 04:00 | Stefanie Tan v Risa Ushijima | 5-7,6-3,6-4 |
| ITF Women Hua Hin | 2017/07/20 03:15 | Bunyawi Thamchaiwat v Risa Ushijima | 6-1,7-5 |
| ITF Women Hua Hin | 2017/07/19 03:00 | Michika Ozeki v Risa Ushijima | 1-6,6-7 |
| ITF Women Hua Hin | 2017/07/18 06:30 | Ksenia Laskutova v Risa Ushijima | 2-6,2-6 |
| ITF Women Hua Hin | 2017/07/12 06:00 | Risa Ushijima v Alexandra Bozovic | 4-6,6-4,5-7 |
| ITF Women Hua Hin | 2017/07/11 03:00 | Risa Ushijima v Aiko Yoshitomi | 7-5,6-1 |
| ITF Women Taipei | 2017/06/24 02:00 | Risa Ushijima v Pei-Chi Lee | 3-6,6-3,4-6 |
| ITF Women Toyota Qual | 2017/11/12 03:05 | Na Ri Kim v Ayumi Koshiishi | 6-3,6-2 |
| ITF Women Tokyo Qual | 2017/11/05 02:55 | Ayumi Koshiishi v Naomi Cheong | 6-7,1-6 |
| ITF Women Tokyo Qual | 2017/11/04 05:35 | Ayumi Koshiishi v Mitsumi Kawasaki | 6-4,5-7,6-4 |
| ITF Women Hamamatsu | 2017/10/18 02:30 | Momoko Kobori v Ayumi Koshiishi | 7-6,6-3 |
| ITF Women Hamamatsu Qual | 2017/10/17 06:00 | Mami Hasegawa v Ayumi Koshiishi | 2-6,6-3,6-7 |
| ITF Women Hamamatsu Qual | 2017/10/16 02:00 | Aoiko Goto v Ayumi Koshiishi | 0-6,2-6 |
| ITF Women Hamamatsu Qual | 2017/10/14 00:00 | Makoto Yamaguchi v Ayumi Koshiishi | 1-6,4-6 |
| ITF Women Makinohara | 2017/10/12 03:20 | Miyabi Inoue v Ayumi Koshiishi | 6-4,6-2 |