Stadium: Court 4 Round: 54
| ITF Women Kurume Qual | 2018/05/13 08:25 | Matsumoto, Ari v Itoyama, Nao | 6-0,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Matsumoto, Ari v Ueda, Ramu | 3-6,6-7 |
| ITF Women Kashiwa | 2018/04/03 03:10 | Zhang, Yuxuan v Matsumoto, Ari | 6-3,6-4 |
| Kofu, Singles W-WITF-JPN-02A | 2018/03/28 03:15 | Bianca Andreescu v Matsumoto, Ari | 6-0,6-1 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/08 07:30 | Bukta, Agnes v Matsumoto, Ari | 6-3,6-1 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/07 09:50 | Stamat, Vitalia v Matsumoto, Ari | 6-4,4-6,4-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/05 07:00 | Stankovic, Aleksandra v Matsumoto, Ari | 2-6,7-6,4-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/04 08:30 | Matsumoto, Ari v Di Battista, Elena | 6-2,6-1 |
| ITF Women Kurume Qual | 2018/05/13 09:35 | Takayama, Chihiro v Tori Kinard | 2-6,7-5,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 02:20 | Yoshitomi, Aiko v Takayama, Chihiro | 6-2,6-3 |
| ITF Women Osaka Qual | 2018/04/07 05:30 | Takayama, Chihiro v Miyamoto, Ayumi | 2-6,4-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 00:30 | Lykina, Ksenia v Takayama, Chihiro | 7-6,6-3 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/19 01:00 | Lee, So-Ra v Takayama, Chihiro | 6-3,7-5 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/18 01:00 | Kishigami, Utaka v Takayama, Chihiro | 2-6,4-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/17 01:00 | Furukawa, Suzuka v Takayama, Chihiro | 4-6,2-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Takayama, Chihiro v Eguchi, Misa | 1-6,4-6 |