Stadium: Court B4 Round: 54
| ITF Women Osaka Qual | 2018/04/08 03:30 | 이, 야수안 v 야마구치, 메이 | 3-6,6-1,6-4 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 01:00 | 야마구치, 메이 v 오카무라, 쿄카 | 6-1,3-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 00:30 | 야마구치, 메이 v 오시노, 스즈호 | 6-1,7-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 06:45 | 야마구치, 메이 v 타나카, 유우키 | 6-4,3-6,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/19 01:00 | 야마구치, 메이 v Chimura, Momoka | 6-4,6-1 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/18 01:00 | 야마구치, 메이 v Sueno, Satoko | 6-1,6-2 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/17 01:00 | 야마구치, 메이 v Koshino, Natsumi | 6-2,6-0 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | 아키타, 시호 v 야마구치, 메이 | 6-3,6-1 |
| ITF Women Osaka Qual | 2018/04/09 01:00 | Chiang, Yuki Kristina v Lertpitaksinchai, Nicha | 1-6,3-6 |
| ITF Women Osaka Qual | 2018/04/08 02:00 | Chiang, Yuki Kristina v Kato, Kei | 3-6,6-4,6-2 |
| ITF Women Kashiwa Qual | 2018/04/01 05:00 | 코보리, 모모코 v Chiang, Yuki Kristina | 6-2,6-3 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/26 01:00 | Lykina, Ksenia v Chiang, Yuki Kristina | 7-5,7-5 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 01:00 | 장, 잉 v Chiang, Yuki Kristina | 6-1,3-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 00:30 | Goto, Aoiko v Chiang, Yuki Kristina | 1-6,0-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/22 03:00 | Chiang, Yuki Kristina v 오쿠노, 아야카 | 6-1,5-7,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 01:00 | 한, 나래 v Chiang, Yuki Kristina | 3-6,4-6 |