Stadium: Court 7 Round: 62 Ground: Hardcourt outdoor
| ITF Women Kofu Qual | 2018/03/24 04:00 | Ling Zhang v Mami Hasegawa | 6-4,4-6,6-7 |
| ITF Women Nishi-Tama | 2018/03/22 03:00 | Mami Hasegawa v Giulia Gatto Monticone | 2-6,1-6 |
| ITF Women Nishi-Tama | 2018/03/21 02:00 | Mami Hasegawa v Makoto Yamaguchi | 6-4,6-2 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Yukina Saigo v Mami Hasegawa | 3-6,4-6 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Aoi Ishino v Mami Hasegawa | 5-7,0-6 |
| ITF Women Nishi-Tama | 2018/03/17 01:00 | Mami Hasegawa v Ange Oby Kajuru | 6-4,2-6,6-2 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Mami Hasegawa v Risa Ushijima | 1-6,6-3,2-6 |
| ITF Women Hamamatsu Qual | 2017/10/17 06:00 | Mami Hasegawa v Ayumi Koshiishi | 2-6,6-3,6-7 |
| ITF Women Kofu Qual | 2018/03/24 04:00 | Chie Kezuka v Kotomi Takahata | 4-6,5-7 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Kotomi Takahata v Michiru Furuya | 7-6,5-7,4-6 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Kotomi Takahata v Kiko Nishizato | 6-3,6-3 |
| ITF Women Nishi-Tama | 2018/03/17 04:00 | Kotomi Takahata v Sae Haraguchi | 6-1,6-1 |
| ITF Women Burnie Qual | 2018/01/27 23:00 | Jia Qi Ren v Kotomi Takahata | 6-7,6-3,6-1 |
| ITF Women Toyota Qual | 2017/11/12 01:40 | Megumi Nishimoto v Kotomi Takahata | 6-3,2-6,6-3 |
| ITF Women Makinohara | 2017/10/11 00:30 | Kotomi Takahata v Naomi Cheong | 0-6,1-6 |
| WTA Dalian Qual | 2017/09/03 06:10 | Hiroko Kuwata v Kotomi Takahata | 6-2,6-0 |