Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF Women Singapore | 2018/06/06 03:55 | Tanaka, Yuuki v Haruka Kaji | 7-6,4-6,1-6 |
| ITF Women Singapore | 2018/06/05 03:35 | Tanaka, Yuuki v Lynelle En Tong Lim | 6-0,6-0 |
| ITF Women Changwon | 2018/05/24 02:40 | Flink, Varvara v Tanaka, Yuuki | 7-5,6-2 |
| ITF Women Changwon | 2018/05/23 01:00 | Tanaka, Yuuki v Lee, Pei-Chei | 6-3,6-2 |
| ITF Women Incheon | 2018/05/16 01:30 | Peangtarn Plipuech v Tanaka, Yuuki | 6-1,6-0 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 06:45 | Mei Yamaguchi v Tanaka, Yuuki | 6-4,3-6,1-6 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2018/03/04 07:30 | Moyuka Uchijima v Tanaka, Yuuki | 2-6,6-2,6-1 |
| ITF Women Perth Qual | 2018/02/11 02:00 | Monique Barry v Tanaka, Yuuki | 2-6,1-6 |
| ITF Women Karuizawa Qual | 2018/05/21 01:00 | Kawasaki, Mitsumi v Rina Saigo | 1-6,2-6 |
| 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 |