Estadio: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF Makinohara - Femenino | 2018/10/11 02:55 | Momoko Kobori v Mei Yamaguchi | 6-1,6-3 |
| ITF Gifu - Femenino | 2018/05/01 01:00 | Mei Yamaguchi v Momoko Kobori | 6-4,3-6,3-6 |
| ITF W25 Yokohama | 2020/03/04 04:35 | Mei Yamaguchi v Junri Namigata | 6-4,6-4 |
| ITF W25 Yokohama | 2020/03/03 03:20 | Mei Yamaguchi v Ari Matsumoto | 6-1,6-1 |
| ITF W25 Yokohama | 2020/03/03 01:00 | Mei Yamaguchi v Yuka Hosoki | 6-1,6-2 |
| ITF W60 Kioto | 2020/02/20 04:15 | Mei Yamaguchi v Risa Ushijima | 6-2,6-7,2-6 |
| ITF W60 Kioto | 2020/02/19 02:15 | Ari Matsumoto v Mei Yamaguchi | 5-7,2-6 |
| ITF W25 Nonthaburi | 2020/01/26 07:00 | Mei Yamaguchi v Marianna Zakarlyuk | 7-5,5-7,7-10 |
| ITF W25 Hong Kong | 2020/01/09 04:25 | Mei Yamaguchi v Jana Fett | 1-6,0-6 |
| ITF W25 Hong Kong | 2020/01/08 06:00 | Mei Yamaguchi v Siqi Cao | 6-3,2-6,6-1 |
| ITF W25 Yokohama | 2020/03/04 08:30 | Anri Nagata v Momoko Kobori | 3-6,2-6 |
| ITF W60 Kioto | 2020/02/19 01:00 | Akiko Omae v Momoko Kobori | 6-2,6-1 |
| ITF W25 Nonthaburi | 2020/01/29 02:30 | Varvara Flink v Momoko Kobori | 6-2,6-1 |
| ITF W25 Hong Kong | 2020/01/09 03:35 | Eudice Chong v Momoko Kobori | 7-6,6-0 |
| ITF W25 Hong Kong | 2020/01/08 02:00 | Momoko Kobori v Ling Zhang | 6-1,6-3 |
| ITF W25 Hua Hin | 2019/11/13 03:00 | Nudnida Luangnam v Momoko Kobori | 6-2,6-3 |
| ITF W25 Hua Hin | 2019/11/06 03:00 | Lesley Pattinama Kerkhove v Momoko Kobori | 6-3,6-3 |
| ITF W25 Makinohara | 2019/10/10 02:25 | Sakura Hondo v Momoko Kobori | 2-6,6-4,6-4 |