Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF Women Hong Kong | 2018/07/10 03:50 | Ayumi Koshiishi v Haine Ogata | 6-1,6-4 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Ayumi Koshiishi v Roa, Jillian Louise | 6-2,6-1 |
| Hua Hin, Simples W-ITF-THA-10A | 2019/10/10 03:00 | Patcharin Cheapchandej v Ayumi Koshiishi | 6-1,6-3 |
| Hua Hin, Simples W-ITF-THA-10A | 2019/10/09 03:00 | Ayumi Koshiishi v Mananchaya Sawangkaew | 6-2,6-3 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/05 05:30 | Ayumi Koshiishi v Michika Ozeki | 0-6,3-6 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/04 04:25 | Imanishi, Miharu v Ayumi Koshiishi | 3-6,4-6 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/02 04:00 | Ayumi Koshiishi v Kishigami, Utaka | 7-5,7-6 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/02 00:00 | Ayumi Koshiishi v Tan, Hx Isabella | 6-0,6-1 |
| ITF W25 Nanao | 2019/08/27 01:00 | Ayumi Koshiishi v Anri Nagata | 4-6,0-6 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Haine Ogata v Alogo Piqueras, Gloria | 6-2,6-4 |
| Nonthaburi, Simples W-ITF-THA-06A | 2019/12/02 02:30 | Kim, Da Hye v Haine Ogata | 6-4,6-3 |
| Nonthaburi, Qualifications Simples W-ITF-THA-06A | 2019/12/01 03:25 | Jongma, Piyaphat v Haine Ogata | 0-6,1-6 |
| ITF - W15 Antalya | 2019/11/21 07:00 | Haine Ogata v Gaspar-Ivan, Ioana | 5-7,2-6 |
| ITF - W15 Antalya | 2019/11/20 10:30 | Haine Ogata v Farbas, Reka | 6-2,6-2 |
| ITF - W15 Antalya | 2019/11/19 07:00 | Haine Ogata v Elena Korokozidi | 6-7,6-3,11-9 |
| ITF - W15 Antalya | 2019/11/13 09:50 | Haine Ogata v Kostenko, L. | 4-6,1-6 |
| Hua Hin, Simples W-ITF-THA-10A | 2019/10/16 03:00 | Olga Helmi v Haine Ogata | 6-3,6-4 |