Stadium: Court 9 Round: 62
| ITF Women Osaka Qual | 2018/04/07 02:30 | Ya-Hsuan Lee v Hondo, Sakura | 6-3,6-1 |
| ITF Women Kashiwa Qual | 2018/04/02 01:00 | Zhang, Yuxuan v Ya-Hsuan Lee | 6-2,6-1 |
| ITF Women Kashiwa Qual | 2018/04/01 03:00 | Nishida, Nao v Ya-Hsuan Lee | 1-6,0-6 |
| Toyota, Singles W-WITF-JPN-02A | 2018/03/14 02:35 | Ya-Hsuan Lee v Namigata, Junri | 4-6,2-6 |
| ITF Women Toyota Qual | 2018/03/12 03:25 | Momoko Kobori v Ya-Hsuan Lee | 7-5,2-6,1-6 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Chiang, Yuki Kristina v Ya-Hsuan Lee | 1-6,0-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Lee, So-Ra v Ya-Hsuan Lee | 6-7,3-6 |
| Yokohama, Singles W-WITF-JPN-01B | 2018/03/07 01:00 | Harriet Dart v Ya-Hsuan Lee | 6-1,6-0 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 01:00 | Mei Yamaguchi v Kyoka Okamura | 6-1,3-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 00:30 | Mei Yamaguchi v Oshino, Suzuho | 6-1,7-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 06:45 | Mei Yamaguchi v Tanaka, Yuuki | 6-4,3-6,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/19 01:00 | Mei Yamaguchi v Chimura, Momoka | 6-4,6-1 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/18 01:00 | Mei Yamaguchi v Sueno, Satoko | 6-1,6-2 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/17 01:00 | Mei Yamaguchi v Koshino, Natsumi | 6-2,6-0 |
| 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 | Mana Ayukawa v Mei Yamaguchi | 4-6,2-6 |