Stadium: Court B Round: 25
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/15 05:40 | Rutuja Bhosale v Ren, Jia Qi | 7-6,6-2 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/13 03:20 | Rachdanone, Prarisa v Ren, Jia Qi | 0-6,0-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/12 03:25 | Kajuru, Ange Oby v Ren, Jia Qi | 4-6,4-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/11 07:00 | Tumthong, Dolavee v Ren, Jia Qi | 7-6,4-6,2-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/04 06:10 | Ren, Jia Qi v Ayumi Koshiishi | 1-6,6-1,2-6 |
| ITF Women Nonthaburi Qual | 2018/07/14 05:35 | Patcharin Cheapchandej v Ren, Jia Qi | 6-2,6-1 |
| ITF Women Tianjin Qual | 2018/07/08 02:00 | Cai, Xinyu v Ren, Jia Qi | 6-3,7-5 |
| ITF Women Madrid Qual | 2018/06/18 10:15 | Pribylova, Anastasia v Ren, Jia Qi | 6-0,6-1 |
| ITF Women Nanao | 2018/08/26 05:00 | Okawa, Misa v Miyamoto, Ayumi | 7-6,5-7,6-2 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 03:00 | Haruna Arakawa v Miyamoto, Ayumi | 4-6,6-4,6-1 |
| Kofu, Singles W-WITF-JPN-02A | 2018/06/14 01:00 | Miyamoto, Ayumi v Chang, Kai-Chen | 3-6,7-5,4-6 |
| Kofu, Singles W-WITF-JPN-02A | 2018/06/12 02:50 | Miyamoto, Ayumi v Mana Kawamura | 3-6,6-1,7-5 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/10 00:00 | Miyamoto, Ayumi v Hikaru Sato | 6-1,6-0 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/09 04:00 | Miyamoto, Ayumi v Funa Kozaki | 6-2,6-2 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 04:15 | Miyamoto, Ayumi v Hondo, Sakura | 5-7,1-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/22 01:00 | Miyamoto, Ayumi v Michika Ozeki | 6-1,6-1 |