Stadium: COURT F Round: 54 Ground: Synthetic outdoor
| ITF W60 Kurume | 2019/05/13 00:30 | Tara Moore v Mami Hasegawa | 7-5,6-3 |
| ITF Women Hamamatsu | 2018/10/14 02:00 | Yuki Ando v Mami Hasegawa | 3-6,6-7 |
| ITF Women Hamamatsu | 2018/10/14 01:00 | Kanako Morisaki v Mami Hasegawa | 3-6,6-0,6-1 |
| ITF Women Makinohara | 2018/10/07 00:30 | Mami Hasegawa v Mitsumi Kawasaki | 5-7,6-3,1-6 |
| ITF Women Kyoto | 2018/09/04 02:40 | Mami Hasegawa v Himeno Sakatsume | 3-6,4-6 |
| ITF Women Daegu Qual | 2018/06/18 01:00 | Mami Hasegawa v Se-Hyun Kim | 1-6,1-6 |
| ITF Women Daegu Qual | 2018/06/17 02:00 | Eun Se Jang v Mami Hasegawa | 2-6,3-6 |
| ITF Women Gyeongsan Qual | 2018/06/12 01:00 | Yeong Won Jeong v Mami Hasegawa | 6-4,7-6 |
| ITF W25 Kyoto | 2019/09/02 02:00 | Chisa Hosonuma v Ikumi Yamazaki | 3-6,6-3,10-8 |
| ITF W25 Nanao | 2019/08/26 02:25 | Misaki Matsuda v Ikumi Yamazaki | 7-6,3-6,10-5 |
| ITF W15 Gimcheon | 2019/06/17 02:55 | Ikumi Yamazaki v Jiho Shin | 2-6,3-6 |
| ITF W25 Karuizawa | 2019/05/20 01:00 | Ikumi Yamazaki v Misaki Matsuda | 4-6,3-6 |
| ITF W15 Cairo | 2019/04/25 08:00 | Ikumi Yamazaki v Charlotte Roemer | 2-6,4-6 |
| ITF W15 Cairo | 2019/04/24 10:35 | Aya El Sayed v Ikumi Yamazaki | 4-6,4-6 |
| ITF W15 Cairo | 2019/04/22 08:00 | Chanel Janssen v Ikumi Yamazaki | 3-6,2-6 |
| ITF W15 Cairo | 2019/04/18 08:00 | Aya El Sayed v Ikumi Yamazaki | 7-6,6-7,7-6 |