Stadium: Court B2 Round: 54 Ground: Hardcourt outdoor
| ITF Women Tsukuba | 2018/08/19 00:30 | Nagi Hanatani v Mitsumi Kawasaki | 6-3,6-3 |
| ITF Women Fort Worth | 2018/07/31 18:55 | Maria Jose Portillo Ramirez v Nagi Hanatani | 6-3,6-3 |
| ITF Women Granby | 2018/07/24 16:35 | Usue Maitane Arconada v Nagi Hanatani | 6-3,3-6,6-1 |
| ITF Women Granby Qual | 2018/07/23 14:00 | Nadja Gilchrist v Nagi Hanatani | 5-7,1-6 |
| ITF Women Granby Qual | 2018/07/22 19:50 | Catherine Leduc v Nagi Hanatani | 2-6,7-5,2-6 |
| ITF Women Granby Qual | 2018/07/21 13:00 | Alexandra Riley v Nagi Hanatani | 2-6,1-6 |
| ITF Women Gatineau | 2018/07/16 16:50 | Maria Mateas v Nagi Hanatani | 6-0,6-0 |
| ITF Women Gatineau Qual | 2018/07/15 17:00 | Nagi Hanatani v Aiko Yoshitomi | 7-5,6-4 |
| ITF Women Tsukuba | 2018/08/19 00:30 | Ange Oby Kajuru v Ayumi Koshiishi | 1-6,4-6 |
| ITF Women Nonthaburi | 2018/08/11 03:00 | Ayumi Koshiishi v Punnin Kovapitukted | 2-6,2-6 |
| ITF Women Nonthaburi | 2018/08/06 05:15 | Lou Brouleau v Ayumi Koshiishi | 6-1,6-3 |
| ITF Women Nonthaburi | 2018/08/05 04:15 | Michika Ozeki v Ayumi Koshiishi | 7-6,5-7,3-6 |
| ITF Women Nonthaburi | 2018/08/04 06:10 | Jia Qi Ren v Ayumi Koshiishi | 1-6,6-1,2-6 |
| ITF Women Taipei | 2018/07/26 02:00 | Ayumi Koshiishi v Hua-Chen Lee | 3-6,0-6 |
| ITF Women Taipei | 2018/07/24 03:45 | Ting-Pei Chang v Ayumi Koshiishi | 2-6,1-6 |
| ITF Women Hong Kong | 2018/07/13 03:00 | Sakura Hosogi v Ayumi Koshiishi | 3-6,6-4,6-3 |