Stadium: Court 5 Round: 54
| ITF Women Kashiwa Qual | 2018/04/01 05:00 | Momoko Kobori v Yuki Kristina Chiang | 6-2,6-3 |
| ITF Women Kofu Qual | 2018/03/26 03:55 | Momoko Kobori v Rebecca Marino | 6-2,2-6,3-6 |
| ITF Women Kofu Qual | 2018/03/25 02:30 | Momoko Kobori v Chin-Wei Chan | 6-2,6-2 |
| ITF Women Kofu Qual | 2018/03/24 03:00 | Momoko Kobori v Yumeko Yoshitomi | 6-0,6-1 |
| ITF Women Toyota Qual | 2018/03/12 03:25 | Momoko Kobori v Ya-Hsuan Lee | 7-5,2-6,1-6 |
| ITF Women Toyota Qual | 2018/03/11 05:00 | Momoko Kobori v Yexin Ma | 5-7,7-5,6-0 |
| ITF Women Toyota Qual | 2018/03/10 08:00 | Momoko Kobori v Naomi Cheong | 6-0,6-0 |
| ITF Women Yokohama | 2018/03/09 05:30 | Momoko Kobori v Veronika Kudermetova | 6-2,3-6,2-6 |
| ITF Women Kashiwa Qual | 2018/04/01 05:00 | Aiko Yoshitomi v Sunam Jeong | 1-6,6-7 |
| ITF Women Nishi-Tama | 2018/03/20 01:00 | Dabin Kim v Sunam Jeong | 6-4,3-6,6-1 |
| ITF Women Toyota Qual | 2018/03/12 01:00 | Miyabi Inoue v Sunam Jeong | 6-4,6-2 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Ji-Hee Choi v Sunam Jeong | 2-6,2-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Kwan Yau Ng v Sunam Jeong | 2-6,5-7 |
| 2018 Fed Cup | 2018/02/10 05:55 | Lin Zhu v Sunam Jeong | 4-6,7-5,6-1 |
| 2018 Fed Cup | 2018/02/09 05:15 | Nicha Lertpitaksinchai v Sunam Jeong | 7-6,2-6,0-6 |
| 2018 Fed Cup | 2018/02/08 04:30 | Kurumi Nara v Sunam Jeong | 6-3,6-0 |