| ITF Women Nanao | 2018/08/27 03:50 | 양, 이디 v Kitagawa, Rio | 6-1,6-2 |
| ITF Women Gimcheon | 2018/08/23 03:50 | 김, 다예 v Kitagawa, Rio | 6-4,6-2 |
| ITF Women Gimcheon | 2018/08/15 01:00 | Kitagawa, Rio v Natarajan, Ramya | 1-6,1-6 |
| ITF Women Taipei | 2018/07/23 03:00 | Kitagawa, Rio v Chang, Ting-Pei | 6-2,4-6,4-6 |
| ITF Women Jakarta | 2018/07/17 07:00 | 쿨람바예바, 지베크 v Kitagawa, Rio | 6-2,6-1 |
| ITF Women Solo | 2018/07/10 06:00 | Du, Zhima v Kitagawa, Rio | 6-3,6-2 |
| ITF Women Daegu Qual | 2018/06/19 01:00 | 오쿠노, 아야카 v Kitagawa, Rio | 6-0,7-6 |
| ITF Women Daegu Qual | 2018/06/18 01:00 | Bizhukova, Fatima v Kitagawa, Rio | 2-6,0-6 |
| ITF Women Kyoto | 2018/09/02 03:00 | 야마자키, 이쿠미 v Shimizu, Yuzuka | 6-1,6-1 |
| ITF Women Nanao | 2018/08/26 04:30 | 야마자키, 이쿠미 v So, Kumi | 1-6,1-6 |
| ITF Women Nanao | 2018/08/26 01:00 | 카지타니, 로부 v 야마자키, 이쿠미 | 6-2,1-6,3-6 |