Stadium: Court 11 Round: 54
| ITF Women Karuizawa Qual | 2018/05/20 02:30 | Kawasaki, Mitsumi v Akiyama, Minami | 6-3,6-3 |
| ITF Women Kurume Qual | 2018/05/14 04:30 | Kawasaki, Mitsumi v Nefedova, Anastasia Evgenyevna | 3-6,2-6 |
| ITF Women Kurume Qual | 2018/05/13 08:40 | Kawasaki, Mitsumi v Ayano Sonoda | 6-1,6-1 |
| ITF Women Fukuoka Qual | 2018/05/06 04:15 | Kawasaki, Mitsumi v Myers, Abbie | 1-6,2-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Hiroko Kuwata v Kawasaki, Mitsumi | 6-0,7-6 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Rebecca Marino v Kawasaki, Mitsumi | 6-1,6-4 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 02:30 | Erika Sema v Kawasaki, Mitsumi | 6-0,6-2 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 03:00 | Shimizu, Chinatsu v Kawasaki, Mitsumi | 3-6,6-4,2-6 |
| ITF Women Karuizawa Qual | 2018/05/20 02:30 | Rina Saigo v Kitagawa, Rio | 6-2,6-3 |
| ITF Women Karuizawa Qual | 2017/05/21 01:00 | Rina Saigo v Baba, Sari | 4-6,2-6 |
| ITF Women Kyoto | 2016/09/04 01:00 | Kamiyoshihara, Ai v Rina Saigo | 6-7,7-5,6-3 |
| ITF Women Noto Qual | 2016/08/28 01:00 | Rina Saigo v Himeno Sakatsume | 6-2,3-6,4-6 |
| ITF Women Hong Kong | 2016/07/10 02:00 | Alexandra Bozovic v Rina Saigo | 6-2,6-2 |