Stadium: Court B4 Round: 54
| ITF Women Gifu Qual | 2018/04/29 09:40 | Aiko Yoshitomi v Makoto Ninomiya | 4-6,1-6 |
| ITF Women Gifu Qual | 2018/04/29 04:00 | Chiaki Takamatsu v Makoto Ninomiya | 7-6,0-6,1-6 |
| ITF Women Osaka | 2018/04/12 02:25 | Makoto Ninomiya v Rebecca Marino | 1-6,4-6 |
| ITF Women Osaka | 2018/04/11 01:00 | Makoto Ninomiya v Karman Kaur Thandi | 6-4,6-4 |
| ITF Women Osaka Qual | 2018/04/09 02:25 | Erina Hayashi v Makoto Ninomiya | 6-1,6-7,2-6 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Moyuka Uchijima v Makoto Ninomiya | 3-6,4-6 |
| ITF Women Osaka Qual | 2018/04/08 01:00 | Haine Ogata v Makoto Ninomiya | 2-6,3-6 |
| ITF Women Kashiwa Qual | 2018/04/01 03:30 | Kai-Chen Chang v Makoto Ninomiya | 6-1,6-7,7-6 |
| ITF Women Gifu Qual | 2018/04/29 04:20 | Mei Yamaguchi v Yuki Kristina Chiang | 6-1,6-2 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Ya-Hsuan Lee v Mei Yamaguchi | 3-6,6-1,6-4 |
| ITF Women Kofu Qual | 2018/03/25 01:00 | Mei Yamaguchi v Kyoka Okamura | 6-1,3-6,1-6 |
| ITF Women Kofu Qual | 2018/03/24 00:30 | Mei Yamaguchi v Suzuho Oshino | 6-1,7-6 |
| ITF Women Nishi-Tama | 2018/03/20 06:45 | Mei Yamaguchi v Yuuki Tanaka | 6-4,3-6,1-6 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Mei Yamaguchi v Momoka Chimura | 6-4,6-1 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Mei Yamaguchi v Satoko Sueno | 6-1,6-2 |
| ITF Women Nishi-Tama | 2018/03/17 01:00 | Mei Yamaguchi v Natsumi Koshino | 6-2,6-0 |