Stadium: Court 5 Round: 44
| ITF Women Gyeongsan Qual | 2018/06/10 02:00 | Morimoto, Nagisa v Lee, Han Byeol | 6-0,6-3 |
| ITF Women Sangju Qual | 2018/06/03 01:00 | Morimoto, Nagisa v Sakura Hosogi | 4-6,6-2,5-7 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Tammi Patterson v Morimoto, Nagisa | 7-5,6-3 |
| ITF Women Osaka Qual | 2018/04/07 04:00 | Morimoto, Nagisa v Lertpitaksinchai, Nicha | 0-6,3-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 03:00 | Morimoto, Nagisa v Rebecca Marino | 2-6,1-6 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Glushko, Julia v Morimoto, Nagisa | 6-0,6-0 |
| ITF Women Hammamet | 2018/02/07 11:40 | Morimoto, Nagisa v Melania Delai | 3-6,1-6 |
| ITF Women Hammamet | 2018/02/04 10:00 | Bursa, Anastasia v Morimoto, Nagisa | 4-6,2-6 |
| ITF Women Sangju Qual | 2018/06/04 05:00 | Hasegawa, Mami v Lee, Jin Ju | 4-6,4-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Koike, Satsuki v Hasegawa, Mami | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Hasegawa, Mami v Lertpitaksinchai, Nicha | 6-2,6-7,4-6 |
| ITF Women Osaka Qual | 2018/04/07 04:00 | Nagomi Higashitani v Hasegawa, Mami | 7-6,4-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/26 01:00 | Hasegawa, Mami v Shiho Akita | 2-6,0-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 02:30 | Hasegawa, Mami v Takahata, Kotomi | 6-2,7-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 04:00 | Zhang, Ling v Hasegawa, Mami | 6-4,4-6,6-7 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/22 03:00 | Hasegawa, Mami v Gatto-Monticone, Giulia | 2-6,1-6 |