| ITF Women Iizuka Qual | 2016/09/26 01:00 | Kotomi Takahata v Mei Yamaguchi | 6-2,6-1 |
| ITF Femminile Kurume - Qual. | 2017/05/14 03:15 | Ayano Sonoda v Mei Yamaguchi | 0-6,3-6 |
| ITF Femminile Fukuoka - Qual. | 2017/05/07 06:00 | Mei Yamaguchi v Monique Adamczak | 1-6,3-6 |
| ITF Femminile Fukuoka - Qual. | 2017/05/07 01:00 | Mei Yamaguchi v Mina Miyahara | 6-1,6-3 |
| ITF Femminile Kofu - Qual. | 2017/03/25 03:30 | Xiyu Wang v Mei Yamaguchi | 6-4,6-2 |
| ITF Femminile Nishi-Tama | 2017/03/18 03:00 | Kanako Morisaki v Mei Yamaguchi | 7-5,7-5 |
| ITF Femminile Yokohama - Qual. | 2017/03/05 03:00 | Mei Yamaguchi v Ramu Ueda | 2-6,2-6 |
| ITF Femminile Makinohara - Qual. | 2016/10/09 03:00 | Hayaka Murase v Mei Yamaguchi | 6-2,3-6,6-3 |
| ITF Women Iizuka Qual | 2016/09/26 01:00 | Kotomi Takahata v Mei Yamaguchi | 6-2,6-1 |
| ITF Femminile Kurume - Qual. | 2017/05/14 05:00 | Anri Nagata v Kotomi Takahata | 4-6,3-6 |
| ITF Femminile Fukuoka - Qual. | 2017/05/07 04:35 | Kotomi Takahata v Erina Hayashi | 4-6,6-2,0-6 |
| ITF Femminile Fukuoka - Qual. | 2017/05/07 01:00 | Naoko Eto v Kotomi Takahata | 3-6,2-6 |
| ITF Femminile Gifu - Qual. | 2017/04/30 05:45 | Kotomi Takahata v Jia-Qi Kang | 2-6,3-6 |
| ITF Femminile Kashiwa - Qual. | 2017/04/03 00:30 | Sunam Jeong v Kotomi Takahata | 6-0,7-6 |
| ITF Femminile Kashiwa - Qual. | 2017/04/02 04:00 | Kotomi Takahata v Seung-Yeon Hong | 6-4,6-3 |
| ITF Femminile Kofu - Qual. | 2017/03/25 01:00 | Kotomi Takahata v Wushuang Zheng | 3-6,0-6 |
| ITF Femminile Nishi-Tama | 2017/03/22 04:50 | Kotomi Takahata v Sarah Rebecca Sekulic | 1-6,1-6 |