Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| ITF Women Incheon | 2018/05/16 01:30 | Na-Lae Han v Ayumi Koshiishi | 6-1,6-7,6-2 |
| ITF W25 Incheon | 2019/06/02 03:00 | Na-Lae Han v Anastasia Gasanova | 6-3,6-0 |
| ITF W25 Incheon | 2019/06/01 03:00 | Na-Lae Han v Natalija Stevanovic | 6-2,6-2 |
| ITF W25 Incheon | 2019/05/31 02:00 | Na-Lae Han v Hanna Chang | 4-6,6-1,6-2 |
| ITF W25 Incheon | 2019/05/30 02:00 | Na-Lae Han v Dabin Kim | 6-0,6-2 |
| ITF W25 Incheon | 2019/05/29 01:00 | Na-Lae Han v Kim, Cherry | 6-0,6-2 |
| Open de France - Femmes | 2019/05/21 13:05 | Na-Lae Han v Garcia Perez, Georgina | 3-6,3-6 |
| Gifu, Singles W-ITF-JPN-09A | 2019/05/02 01:00 | Na-Lae Han v Akiko Omae | 6-1,4-6,1-6 |
| Gifu, Singles W-ITF-JPN-09A | 2019/05/01 02:50 | Broady, Naomi v Na-Lae Han | 4-6,5-7 |
| Daegu, Singles W-ITF-KOR-04A | 2019/06/04 01:00 | Ayumi Koshiishi v Lee, So-Ra | 7-5,6-2 |
| Luzhou, Simples W-ITF-CHN-09A | 2019/05/28 06:15 | Ayumi Koshiishi v Ho, Jessica | 3-6,1-6 |
| Luzhou, Simples W-ITF-CHN-09A | 2019/05/28 02:00 | Ayumi Koshiishi v Zhu, Wanning | 6-0,6-1 |
| ITF W25 Goyang | 2019/05/21 01:00 | Liu, Chang v Ayumi Koshiishi | 6-3,4-6,10-8 |
| ITF W25 Goyang | 2019/05/20 01:00 | Yun, Hyeran v Ayumi Koshiishi | 4-6,3-6 |
| ITF W25 Changwon | 2019/05/14 01:00 | Ayumi Koshiishi v Oh, Soo Bin | 6-3,3-6,5-10 |
| ITF W25 Changwon | 2019/05/13 01:00 | Ayumi Koshiishi v Park, SI On | 6-0,6-1 |
| Fukuoka, Singles W-ITF-JPN-10A | 2019/05/06 01:00 | Mai Hontama v Ayumi Koshiishi | 3-6,6-3,10-2 |