Stadium: Show Court 10 Round: 45 Ground: Hardcourt outdoor
| Xiamen, Singles W-ITF-CHN-05A | 2019/03/22 03:35 | Ayumi Koshiishi v Eudice Chong | 2-6,3-6 |
| Xiamen, Singles W-ITF-CHN-05A | 2019/03/20 02:00 | Ayumi Koshiishi v Ashmitha Easwaramurthi | 6-0,6-1 |
| ITF - W15 Shymkent | 2019/02/21 08:20 | Ayumi Koshiishi v Anastasia Zakharova | 4-6,4-6 |
| ITF - W15 Shymkent | 2019/02/20 05:00 | Ayumi Koshiishi v Astakhova, Anastasia | 6-2,6-4 |
| ITF - W15 Shymkent | 2019/02/13 10:55 | Tolibova, Sadafmoh v Ayumi Koshiishi | 4-6,6-1,6-1 |
| ITF W15 Palmanova | 2019/02/07 09:30 | Medvedeva, Daniella v Ayumi Koshiishi | 6-3,6-1 |
| ITF W15 Palmanova | 2019/02/05 08:30 | Adrover Gallego, Isabel v Ayumi Koshiishi | 1-6,2-6 |
| ITF - W15 Manacor | 2019/01/31 09:00 | Claudia Hoste Ferrer v Ayumi Koshiishi | 6-0,6-2 |
| ITF W25 Canberra | 2019/03/19 23:00 | Zoe Hives v Tanaka, Yuuki | 6-3,6-4 |
| ITF W25 Canberra | 2019/03/18 23:00 | Berezov, Anastasia v Tanaka, Yuuki | 0-6,6-3,7-10 |
| ITF W25 Canberra | 2019/03/17 23:00 | Tanaka, Yuuki v Jain, Mahak | 5-7,6-4,10-8 |
| Mildura, Simples W-ITF-AUS-06A | 2019/03/05 00:00 | Ivana Popovic v Tanaka, Yuuki | 6-2,6-4 |
| Mildura, Simples W-ITF-AUS-06A | 2019/03/03 23:00 | Ashmitha Easwaramurthi v Tanaka, Yuuki | 3-6,0-6 |
| Jodhpur, Singles Qualifying W-ITF-IND-01A | 2019/01/30 09:30 | Tanaka, Yuuki v Imanishi, Miharu | 5-7,5-7 |
| Jodhpur, Singles Qualifying W-ITF-IND-01A | 2019/01/29 04:30 | Tanaka, Yuuki v Soha Sadiq | 6-1,6-2 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/01 12:00 | Gabriela Ce v Tanaka, Yuuki | 6-0,6-1 |