Stadion: Court 14 Round: 25 Ground: Synthetic outdoor
| ITF Damen - Kurume - Qualifikation | 2018/05/13 10:10 | Yuki Kristina Chiang v Yuka Hosoki | 2-6,6-3,6-3 |
| ITF Damen - Hua Hin - Qualifikation | 2018/05/07 05:10 | Yuka Hosoki v Anastasia Berezov | 7-6,4-6,1-6 |
| ITF Damen - Hua Hin - Qualifikation | 2018/05/06 02:30 | Yuka Hosoki v Romklao Yuenyao | 6-2,6-1 |
| ITF Damen - Hua Hin - Qualifikation | 2018/04/30 03:55 | Yuka Hosoki v Supapitch Kuearum | 3-6,6-2,2-6 |
| ITF Damen - Hua Hin - Qualifikation | 2018/04/29 07:30 | Yuka Hosoki v Sarah Pang | 6-0,6-1 |
| ITF Women Sharm El Sheikh | 2018/04/08 10:30 | Kelia Le Bihan v Yuka Hosoki | 4-6,7-6,6-4 |
| ITF Women Sharm El Sheikh | 2018/04/02 10:30 | Nidhi Chilumula v Yuka Hosoki | 6-3,6-3 |
| ITF Women Sharm El Sheikh | 2018/04/01 10:30 | Mariana Correa v Yuka Hosoki | 2-6,4-6 |
| ITF Damen - Kurume - Qualifikation | 2018/05/14 03:10 | Yuki Kristina Chiang v Kotomi Takahata | 6-4,4-6,7-6 |
| ITF Damen - Kurume - Qualifikation | 2018/05/13 09:50 | Mei Yamaguchi v Kotomi Takahata | 6-3,3-6,4-6 |
| ITF Damen - Gifu - Qualifikation | 2018/04/29 01:00 | Emily Webley-Smith v Kotomi Takahata | 6-3,6-2 |
| ITF - Damen - Quanzhou - Qualifikation | 2018/04/21 07:45 | Wushuang Zheng v Kotomi Takahata | 6-1,6-1 |
| ITF Damen - Kofu - Qualifikation | 2018/03/25 02:30 | Mami Hasegawa v Kotomi Takahata | 6-2,7-6 |
| ITF Damen - Kofu - Qualifikation | 2018/03/24 04:00 | Chie Kezuka v Kotomi Takahata | 4-6,5-7 |
| ITF Damen - Nishi-Tama | 2018/03/19 01:00 | Kotomi Takahata v Michiru Furuya | 7-6,5-7,4-6 |
| ITF Damen - Nishi-Tama | 2018/03/18 01:00 | Kotomi Takahata v Kiko Nishizato | 6-3,6-3 |