Stadium: Court B Round: 25 Ground: Hardcourt indoor
| Launceston, Singles Qualifying W-ITF-AUS-03A | 2020/02/04 22:55 | Haruna Arakawa v Ayano Shimizu | 2-6,0-6 |
| Burnie, Simples W-ITF-AUS-02A | 2020/01/27 22:45 | Haruna Arakawa v Mana Ayukawa | 7-5,3-6,5-10 |
| ITF W25 Vero Beach | 2020/01/20 16:00 | Dasha Ivanova v Haruna Arakawa | 6-4,6-1 |
| ITF W25 Daytona Beach | 2020/01/12 16:00 | Haruna Arakawa v Redelijk, Nikki | 4-6,5-7 |
| ITF W25 Hua Hin | 2019/11/13 03:00 | Haruna Arakawa v Lesley Pattinama Kerkhove | 0-6,2-6 |
| ITF W25 Hua Hin | 2019/11/05 03:00 | Haruna Arakawa v Moyuka Uchijima | 1-6,1-6 |
| ITF W25 Hua Hin | 2019/11/04 03:00 | Haruna Arakawa v Piwbangruk, Natthapat | 6-1,6-0 |
| ITF W60 Playford | 2019/10/30 23:30 | Haruna Arakawa v Naiktha Bains | 3-6,0-6 |
| ITF W60 Kyoto | 2020/02/17 08:00 | Erina Hayashi v Yuka Hosoki | 7-6,6-2 |
| ITF W60 Kyoto | 2020/02/17 03:45 | Erina Hayashi v Nishimoto, Megumi | 6-1,6-2 |
| Hong Kong, Simples W-ITF-HKG-01B | 2020/01/09 04:15 | Komardina, Anastasiya v Erina Hayashi | 6-2,6-2 |
| Hong Kong, Simples W-ITF-HKG-01B | 2020/01/08 08:50 | Sofya Lansere v Erina Hayashi | 6-1,5-7,3-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/12/31 02:00 | Erina Hayashi v Hondo, Sakura | 4-6,3-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/12/30 03:00 | Erina Hayashi v Leong, Justine Sophie Kwan Tung | 7-5,6-3 |
| Open d'Australie Asie-Pacifique Wildcard Playoff | 2019/12/04 02:00 | Na-Lae Han v Erina Hayashi | 6-3,6-2 |
| ITF - W100 Tokyo | 2019/11/13 04:00 | Erina Hayashi v Xinyu Wang | 5-7,3-6 |