Stadium: Court A9 Round: 25 Ground: Synthetic outdoor
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/25 03:00 | Xiyu Wang v Momoko Kobori | 4-6,6-3,6-3 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/24 01:00 | Chihiro Muramatsu v Momoko Kobori | 2-6,3-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/23 00:30 | Kanako Morisaki v Momoko Kobori | 7-6,3-6,4-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/21 00:30 | Sawayanagi, Riko v Momoko Kobori | 4-6,3-6 |
| Nanchang, Chine | 2018/07/23 09:00 | Momoko Kobori v Fang Ying Xun | 6-7,0-6 |
| WTA Nanchang Qual | 2018/07/22 11:00 | Momoko Kobori v Xu, Shilin | 6-4,2-6,4-6 |
| WTA Nanchang Qual | 2018/07/21 10:35 | Momoko Kobori v Qianhui Tang | 6-4,6-2 |
| ITF Women Contrexeville | 2018/07/11 09:30 | Ysaline Bonaventure v Momoko Kobori | 6-3,7-6 |
| ITF Women Nanao | 2018/08/27 04:20 | Ushijima, Risa v Kajuru, Ange Oby | 7-5,6-2 |
| ITF Women Nanao | 2018/08/26 06:00 | Ushijima, Risa v Furuya, Michiru | 4-6,6-2,6-4 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/23 03:30 | Xiyu Wang v Ushijima, Risa | 6-4,6-1 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/22 00:30 | Shiho Akita v Ushijima, Risa | 2-6,2-6 |
| ITF Women Nonthaburi Qual | 2018/07/15 04:30 | Patcharin Cheapchandej v Ushijima, Risa | 6-3,6-4 |
| ITF Women Nonthaburi Qual | 2018/07/14 06:25 | Rada Manataweewat v Ushijima, Risa | 2-6,1-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/11 02:00 | Ushijima, Risa v Na-Lae Han | 6-7,1-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/09 04:25 | Ushijima, Risa v Nina Stadler | 6-3,7-6 |