Round: 62 Ground: Hardcourt outdoor
| ITF Women Kofu Qual | 2017/03/27 02:30 | Kumi So v Kei Kato | 2-6,6-7 |
| ITF Women Kofu Qual | 2017/03/25 01:00 | Kimika Sakata v Kei Kato | 4-6,3-6 |
| ITF Women Nishi-Tama | 2017/03/20 01:00 | Kei Kato v Rika Fujiwara | 3-6,0-6 |
| ITF Women Nishi-Tama | 2017/03/19 01:00 | Chihiro Takayama v Kei Kato | 1-6,2-6 |
| ITF Women Yokohama Qual | 2017/03/06 04:00 | Mai Minokoshi v Kei Kato | 6-2,6-7,6-2 |
| ITF Women Hong Kong | 2016/12/24 02:00 | Mingyang Liu v Kei Kato | 7-6,6-3 |
| ITF Women Hamamatsu | 2016/10/19 05:40 | Kei Kato v Shuko Aoyama | 2-6,0-6 |
| ITF Women Makinohara | 2016/10/13 00:30 | Kei Kato v Ksenia Lykina | 1-6,0-6 |
| 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 Surprise Qual | 2017/02/14 16:00 | Anastasia Potapova v Mari Osaka | 6-1,7-5 |