Stadium: Court B Round: 25
| ITF Women Nanao | 2018/08/26 01:00 | Kajitani, Robu v Ikumi Yamazaki | 6-2,1-6,3-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 00:30 | Kajitani, Robu v Mana Ayukawa | 1-6,0-6 |
| ITF Women Nonthaburi Qual | 2018/07/14 02:00 | Zlochova, Zuzana v Kajitani, Robu | 6-4,6-1 |
| ITF Women Nonthaburi Qual | 2018/07/08 02:00 | Patcharin Cheapchandej v Kajitani, Robu | 6-3,6-2 |
| ITF Women Nonthaburi Qual | 2018/07/07 02:00 | Kajitani, Robu v Sowjanya Bavisetti | 0-6,6-3,7-6 |
| ITF Women Daegu Qual | 2018/06/18 03:00 | Kanako Morisaki v Kajitani, Robu | 6-2,6-1 |
| ITF Women Kurume | 2018/05/16 03:25 | Moore, Tara v Kajitani, Robu | 6-4,6-1 |
| ITF Women Fukuoka Qual | 2018/05/07 01:00 | Kajitani, Robu v Hondo, Sakura | 6-2,3-6,4-6 |
| ITF Women Nanao | 2018/08/26 01:00 | Mayuka Aikawa v Shimizu, Chinatsu | 6-3,6-3 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 00:30 | Akiko Omae v Shimizu, Chinatsu | 6-2,6-3 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/09 05:30 | Shimizu, Chinatsu v Lisa-Marie Rioux | 5-7,3-6 |
| ITF Women Fukuoka Qual | 2018/05/07 01:00 | Olivia Tjandramulia v Shimizu, Chinatsu | 7-5,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 02:50 | Furuya, Michiru v Shimizu, Chinatsu | 3-6,1-6 |
| ITF Women Gifu Qual | 2018/04/29 02:35 | Shimizu, Chinatsu v Fujiwara, Rika | 2-6,2-6 |
| ITF Women Osaka Qual | 2018/04/07 02:30 | Shimizu, Chinatsu v Ueda, Ramu | 1-6,4-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 03:00 | Shimizu, Chinatsu v Kawasaki, Mitsumi | 3-6,6-4,2-6 |