Stadium: Court 2 Round: 54
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/26 03:55 | Momoko Kobori v Rebecca Marino | 6-2,2-6,3-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/25 02:30 | Momoko Kobori v Chan, Chin-Wei | 6-2,6-2 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 03:00 | Momoko Kobori v Yoshitomi, Yumeko | 6-0,6-1 |
| 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 05:00 | Momoko Kobori v Yexin Ma | 5-7,7-5,6-0 |
| ITF Women Toyota Qual | 2018/03/10 08:00 | Momoko Kobori v Cheong, Naomi | 6-0,6-0 |
| Yokohama, Singles W-WITF-JPN-01B | 2018/03/09 05:30 | Momoko Kobori v Veronika Kudermetova | 6-2,3-6,2-6 |
| Yokohama, Singles W-WITF-JPN-01B | 2018/03/08 04:50 | Hozumi, Eri v Momoko Kobori | 7-6,3-6,4-6 |
| 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 | Ying Zhang v Chiang, Yuki Kristina | 6-1,3-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/24 00:30 | Aoiko Goto v Chiang, Yuki Kristina | 1-6,0-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/22 03:00 | Chiang, Yuki Kristina v Okuno, Ayaka | 6-1,5-7,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 01:00 | Na-Lae Han v Chiang, Yuki Kristina | 3-6,4-6 |
| 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 | Dabin Kim v Chiang, Yuki Kristina | 2-6,1-6 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2018/03/05 01:00 | Harriet Dart v Chiang, Yuki Kristina | 6-1,6-1 |