Stadium: Court 7 Round: 44
| ITF Women Gyeongsan Qual | 2018/06/10 03:30 | Satsuki Koike v Jeongyun Lee | 7-6,6-1 |
| ITF Women Sangju Qual | 2018/06/03 02:00 | Eri Shimizu v Satsuki Koike | 2-6,7-5,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 01:00 | Nagi Hanatani v Satsuki Koike | 6-1,6-4 |
| ITF Women Gifu Qual | 2018/04/29 04:20 | Hiroko Kuwata v Satsuki Koike | 6-4,6-1 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Satsuki Koike v Mami Hasegawa | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Satsuki Koike v Dabin Kim | 2-6,5-7 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Satsuki Koike v Suzuka Furukawa | 6-0,0-6,6-4 |
| ITF Women Nanjing Qual | 2018/03/24 05:30 | Satsuki Koike v Emma Raducanu | 0-6,0-6 |
| ITF Women Kurume Qual | 2018/05/14 01:00 | Mihoki Miyahara v Megumi Nishimoto | 6-2,6-7,1-6 |
| ITF Women Kurume Qual | 2018/05/13 05:55 | Mihoki Miyahara v Meina Aratake | 6-1,6-1 |
| ITF Women Fukuoka Qual | 2018/05/06 05:25 | Chisa Hosonuma v Mihoki Miyahara | 6-1,7-6 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Chie Kezuka v Mihoki Miyahara | 6-2,6-2 |
| ITF Women Hong Kong | 2017/12/24 02:00 | Aldila Sutjiadi v Mihoki Miyahara | 6-1,6-2 |
| ITF Women Hong Kong | 2017/12/23 04:00 | Wing Kiu Jacqueline Lam v Mihoki Miyahara | 4-6,1-6 |
| ITF Women Tokyo Qual | 2017/11/04 01:00 | Eri Shimizu v Mihoki Miyahara | 6-2,6-0 |
| ITF Women Hamamatsu Qual | 2017/10/16 02:00 | Rion Itaya v Mihoki Miyahara | 6-3,6-4 |