Stadium: Court 10 Round: 27 Ground: Hardcourt outdoor
| WTA Taipei | 2018/11/11 02:00 | Su Jeong Jang v Momoko Kobori | 6-1,6-4 |
| ITF Women Hamamatsu | 2018/10/17 01:00 | Mana Ayukawa v Momoko Kobori | 7-6,2-6,6-2 |
| ITF Women Makinohara | 2018/10/14 02:00 | Momoko Kobori v Junri Namigata | 6-2,6-3 |
| ITF Women Makinohara | 2018/10/13 01:00 | Momoko Kobori v Ayumi Miyamoto | 6-0,4-6,6-3 |
| ITF Women Makinohara | 2018/10/12 01:00 | Momoko Kobori v Shiho Akita | 7-5,6-2 |
| ITF Women Makinohara | 2018/10/11 02:55 | Momoko Kobori v Mei Yamaguchi | 6-1,6-3 |
| ITF Women Makinohara | 2018/10/10 00:30 | Momoko Kobori v Sakura Hondo | 7-5,6-1 |
| WTA Tokyo | 2018/09/15 09:00 | Magda Linette v Momoko Kobori | 7-6,6-3 |
| Australian Open Women WC | 2018/11/28 02:00 | Mai Hontama v Su Jeong Jang | 1-6,2-6 |
| Australian Open Women WC Qual | 2018/11/27 02:00 | Mai Hontama v Rika Fujiwara | 5-7,6-3,6-3 |
| ITF Women Norman | 2018/11/16 16:30 | Mai Hontama v Maria Camila Osorio | 6-4,0-6,4-6 |
| ITF Women Norman | 2018/11/15 15:00 | Mai Hontama v Anastasia E Nefedova | 6-2,6-1 |
| ITF Women Norman | 2018/11/14 17:40 | Mai Hontama v Vladica Babic | 6-3,6-2 |
| ITF Women Makinohara | 2018/10/11 00:30 | Mai Hontama v Ayumi Miyamoto | 6-7,4-6 |
| ITF Women Makinohara | 2018/10/10 03:35 | Mai Hontama v Minami Shuto | 6-0,7-6 |
| ITF Women Stockton | 2018/10/01 19:45 | Mai Hontama v Ena Shibahara | 2-6,1-6 |