Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF Women Kofu Qual | 2018/03/25 02:30 | Mami Hasegawa v Kotomi Takahata | 6-2,7-6 |
| 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 Kofu Qual | 2018/03/25 02:30 | Yui Chikaraishi v Shiho Akita | 1-6,1-6 |
| ITF Women Kofu Qual | 2018/03/24 03:00 | Reina Takahashi v Shiho Akita | 4-6,1-6 |
| ITF Women Toyota | 2018/03/14 04:00 | Shiho Akita v Harriet Dart | 4-6,2-6 |
| ITF Women Toyota Qual | 2018/03/12 02:45 | Shiho Akita v Na Ri Kim | 6-3,6-2 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | Shiho Akita v Mei Yamaguchi | 6-3,6-1 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Shiho Akita v Kei Kato | 6-0,6-3 |
| ITF Women Yokohama Qual | 2018/03/06 01:00 | Shiho Akita v Yexin Ma | 2-6,6-4,1-6 |
| ITF Women Yokohama Qual | 2018/03/04 06:00 | Shiho Akita v Suzuho Oshino | 6-4,7-5 |