Stadium: Court 8 Round: 62
| ITF Women Kofu Qual | 2018/03/25 01:00 | Ksenia Lykina v Ayumi Koshiishi | 7-5,6-7,6-3 |
| ITF Women Kofu Qual | 2018/03/24 00:30 | Ayumi Koshiishi v Haruna Arakawa | 7-5,6-4 |
| ITF Women Nishi-Tama | 2018/03/17 04:00 | Kei Kato v Ayumi Koshiishi | 7-5,6-4 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Ji-Hee Choi v Ayumi Koshiishi | 4-6,6-3,6-2 |
| ITF Women Hong Kong | 2018/01/01 03:35 | Risa Ushijima v Ayumi Koshiishi | 6-1,3-6,7-5 |
| ITF Women Hong Kong | 2017/12/31 02:00 | Ayumi Koshiishi v Pinyi Zuo | 6-1,6-0 |
| ITF Women Hong Kong | 2017/12/30 05:30 | Ayumi Koshiishi v Ashmitha Easwaramurthi | 6-0,6-2 |
| ITF Women Hong Kong | 2017/12/27 03:30 | Ayumi Koshiishi v Ling Zhang | 4-6,3-6 |
| ITF Women Kashiwa Qual | 2018/04/01 03:30 | Akiko Omae v Kyoka Okamura | 4-6,3-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Akiko Omae v Kanako Morisaki | 6-7,3-6 |
| ITF Women Yokohama Qual | 2018/03/06 01:00 | Akiko Omae v Ya-Hsuan Lee | 7-5,6-7,4-6 |
| ITF Women Yokohama Qual | 2018/03/04 05:30 | Akiko Omae v Naho Sato | 6-2,6-2 |
| Australian Open Women WC | 2017/11/29 02:00 | Kai-Chen Chang v Akiko Omae | 6-3,6-3 |
| Australian Open Women WC Qual | 2017/11/28 03:25 | Akiko Omae v Beatrice Gumulya | 6-3,6-4 |
| ITF Women Valencia | 2017/11/21 10:00 | Akiko Omae v Anastasia Grymalska | 1-6,2-6 |
| ITF Women Benicarlo | 2017/11/15 09:00 | Akiko Omae v Irene Burillo Escorihuela | 4-6,1-6 |