Stadium: Court 6 Round: 62 Ground: Synthetic outdoor
| ITF Women Hamamatsu | 2018/10/14 02:00 | Yukina Saigo v Utaka Kishigami | 6-4,6-2 |
| ITF Women Makinohara | 2018/10/08 00:30 | Yukina Saigo v Kisa Yoshioka | 6-7,6-3,3-6 |
| ITF Women Haren | 2018/08/31 09:00 | Yukina Saigo v Natalia Siedliska | 4-6,4-6 |
| ITF Women Haren | 2018/08/30 13:05 | Yukina Saigo v Emma Lene | 6-2,6-2 |
| ITF Women Haren | 2018/08/28 09:50 | Yukina Saigo v Regina Husak | 6-7,6-1,6-1 |
| ITF Women Wanfercee-Baulet | 2018/08/24 15:30 | Yukina Saigo v Caroline Romeo | 6-7,4-6 |
| ITF Women Wanfercee-Baulet | 2018/08/22 12:15 | Yukina Saigo v Victoria Kalaitzis | 7-5,5-7,6-3 |
| ITF Women Wanfercee-Baulet | 2018/08/21 09:00 | Yukina Saigo v Chelsea Vanhoutte | 6-1,3-6,7-6 |
| ITF Women Hamamatsu | 2018/10/14 02:00 | Chinatsu Shimizu v Karin Terami | 6-0,6-2 |
| 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 | Chinatsu Shimizu v Anastasia Berezov | 6-3,6-0 |
| ITF Women Kyoto | 2018/09/04 08:50 | Robu Kajitani v Chinatsu Shimizu | 6-4,6-2 |
| ITF Women Nanao | 2018/08/26 01:00 | Mayuka Aikawa v Chinatsu Shimizu | 6-3,6-3 |
| ITF Women Tsukuba | 2018/08/19 00:30 | Akiko Omae v Chinatsu Shimizu | 6-2,6-3 |
| ITF Women Kofu Qual | 2018/06/09 05:30 | Chinatsu Shimizu v Lisa-Marie Rioux | 5-7,3-6 |
| ITF Women Fukuoka Qual | 2018/05/07 01:00 | Olivia Tjandramulia v Chinatsu Shimizu | 7-5,6-3 |