Stadium: COURT A Round: 25 Ground: Synthetic outdoor
| WTA Tokyo | 2018/09/15 09:00 | Magda Linette v Momoko Kobori | 7-6,6-3 |
| WTA Hiroshima | 2018/09/09 08:15 | Amanda Anisimova v Momoko Kobori | 6-3,6-3 |
| ITF Women Nanao | 2018/08/29 06:05 | Momoko Kobori v Risa Ushijima | 5-7,2-6 |
| ITF Women Tsukuba | 2018/08/25 03:00 | Xiyu Wang v Momoko Kobori | 4-6,6-3,6-3 |
| ITF Women Tsukuba | 2018/08/24 01:00 | Chihiro Muramatsu v Momoko Kobori | 2-6,3-6 |
| ITF Women Tsukuba | 2018/08/23 00:30 | Kanako Morisaki v Momoko Kobori | 7-6,3-6,4-6 |
| ITF Women Tsukuba | 2018/08/21 00:30 | Riko Sawayanagi v Momoko Kobori | 4-6,3-6 |
| WTA Nanchang | 2018/07/23 09:00 | Momoko Kobori v Fang Ying Xun | 6-7,0-6 |
| ITF Women Makinohara | 2018/10/08 00:30 | Sakura Hondo v Chinatsu Shimizu | 6-3,4-6,6-2 |
| ITF Women Makinohara | 2018/10/07 00:30 | Sakura Hondo v Rina Saigo | 6-3,6-2 |
| ITF Women Kyoto | 2018/09/05 01:00 | Nagisa Morimoto v Sakura Hondo | 7-5,4-6,6-4 |
| ITF Women Nanao | 2018/08/30 03:00 | Naiktha Bains v Sakura Hondo | 6-2,6-1 |
| ITF Women Nanao | 2018/08/29 05:25 | Sakura Hondo v Junri Namigata | 4-6,6-4,7-6 |
| ITF Women Nanao | 2018/08/27 01:00 | Sakura Hondo v Ani Vangelova | 6-2,6-2 |
| ITF Women Nanao | 2018/08/26 04:40 | Sakura Hondo v Minami Akiyama | 6-2,6-1 |
| ITF Women Tsukuba | 2018/08/20 01:00 | Haruna Arakawa v Sakura Hondo | 4-6,6-3,6-3 |