Stadium: Court C Round: 25
| ITF Women Jakarta | 2018/07/17 07:00 | Zhibek Kulambayeva v Rio Kitagawa | 6-2,6-1 |
| ITF Women Solo | 2018/07/10 06:00 | Zhima Du v Rio Kitagawa | 6-3,6-2 |
| ITF Women Daegu Qual | 2018/06/19 01:00 | Ayaka Okuno v Rio Kitagawa | 6-0,7-6 |
| ITF Women Daegu Qual | 2018/06/18 01:00 | Fatima Bizhukova v Rio Kitagawa | 2-6,0-6 |
| ITF Women Gyeongsan | 2018/06/12 02:55 | Rio Kitagawa v Ayaka Okuno | 2-6,4-6 |
| ITF Women Sangju | 2018/06/05 01:00 | Rio Kitagawa v Sunam Jeong | 0-6,3-6 |
| 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 |