In her career, Ozaki won seven singles titles on the ITF Women's Circuit.

Ozaki made her WTA Tour debut at the 2013 Tashkent Open, having entered the qualifying tournament and defeating Veronika Kapshay and Ksenia Palkina for a spot in the main draw.

She was thereby pitted against fellow qualifier Kateryna Kozlova and defeated the Ukrainian in straight sets, simultaneously recording her first main-draw win at the WTA Tour-level.

She was subsequently beaten in the second round by Nastassja Burnett in a final-set tiebreak.

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.