Stadium: Court 5 Round: 25
| ITF Women Karuizawa Qual | 2018/05/20 02:30 | Rina Saigo v Rio Kitagawa | 6-2,6-3 |
| ITF Women Tucepi | 2018/04/26 09:00 | Tena Lukas v Rio Kitagawa | 6-0,1-6,6-1 |
| ITF Women Tucepi | 2018/04/24 09:00 | Rio Kitagawa v Anna Klasen | 7-6,5-7,6-4 |
| ITF Women Tucepi | 2018/04/23 08:00 | Rio Kitagawa v Viktoria Surova | 6-4,6-2 |
| ITF Women Sharm El Sheikh | 2018/04/12 10:25 | Rio Kitagawa v Julia Terziyska | 0-6,1-6 |
| ITF Women Sharm El Sheikh | 2018/04/11 09:50 | Ashmitha Easwaramurthi v Rio Kitagawa | 2-6,0-6 |
| ITF Women Sharm El Sheikh | 2018/04/09 08:00 | Alexandra Walters v Rio Kitagawa | 3-6,2-6 |
| ITF Women Sharm El Sheikh | 2018/04/08 08:00 | Lara Panfilov v Rio Kitagawa | 6-7,6-2,3-6 |
| ITF Women Changwon | 2018/05/26 02:15 | Sunam Jeong v Varvara Flink | 4-6,5-7 |
| ITF Women Changwon | 2018/05/25 01:00 | Sunam Jeong v Ji-Hee Choi | 6-3,6-2 |
| ITF Women Changwon | 2018/05/24 01:00 | Katy Dunne v Sunam Jeong | 3-6,3-6 |
| ITF Women Changwon | 2018/05/22 01:00 | Sunam Jeong v Kaylah McPhee | 6-3,3-6,6-2 |
| ITF Women Incheon | 2018/05/15 03:20 | Jovana Jaksic v Sunam Jeong | 7-6,7-6 |
| ITF Women Goyang | 2018/05/09 01:00 | Sunam Jeong v Na-Lae Han | 4-6,2-6 |
| ITF Women Kashiwa Qual | 2018/04/02 02:35 | Momoko Kobori v Sunam Jeong | 6-0,6-2 |
| ITF Women Kashiwa Qual | 2018/04/01 05:00 | Aiko Yoshitomi v Sunam Jeong | 1-6,6-7 |