Round: 25 Ground: Hardcourt outdoor
| ITF Women Kofu Qual | 2017/03/27 04:00 | Kei Kato v Mari Osaka | 0-6,1-6 |
| ITF Women Kofu Qual | 2017/03/27 02:30 | Nozomi Fujioka v Mari Osaka | 0-6,3-6 |
| ITF Women Kofu Qual | 2017/03/25 01:00 | Kanako Osafune v Mari Osaka | 1-6,0-6 |
| ITF Women Tampa | 2017/03/18 15:40 | Michelle Larcher de Brito v Mari Osaka | 3-6,7-5,6-4 |
| ITF Women Tampa | 2017/03/17 14:00 | Renata Zarazua v Mari Osaka | 1-6,0-6 |
| ITF Women Tampa | 2017/03/16 14:00 | Mari Osaka v Katerina Kramperova | 7-6,6-4 |
| ITF Women Tampa | 2017/03/14 15:00 | Veronika Miroshnichenko v Mari Osaka | 2-6,1-6 |
| ITF Women Rancho Santa Fe Qual | 2017/02/19 17:00 | Mari Osaka v Ashley Kratzer | 6-7,3-6 |
| ITF Women Shenzhen Qual | 2017/03/12 07:20 | Eri Hozumi v Jessica Pieri | 5-7,7-6,5-7 |
| ITF Women Zhuhai Qual | 2017/03/05 06:15 | Eri Hozumi v Martina Trevisan | 2-6,6-2,6-7 |
| ITF Women Clare | 2017/03/02 03:10 | Sherazad Reix v Eri Hozumi | 6-2,6-4 |
| ITF Women Clare | 2017/03/01 01:30 | Ching-Wen Hsu v Eri Hozumi | 2-6,4-6 |
| WTA Taipei Qual | 2017/01/28 04:35 | Eri Hozumi v Julia Glushko | 6-7,4-6 |
| Australian Open 2017 Women | 2017/01/16 08:10 | Eri Hozumi v Carina Witthoeft | 5-7,6-7 |
| Australian Open 2017 Women Qual | 2017/01/14 03:10 | Eri Hozumi v Viktoriya Tomova | 7-5,6-2 |
| Australian Open 2017 Women Qual | 2017/01/13 09:20 | Valentini Grammatikopoulou v Eri Hozumi | 1-6,1-6 |