Hanatani has a career-high WTA singles ranking of 356, achieved on 10 August 2020.

She also has a career-high WTA doubles ranking of 369, reached on 28 January 2019.

[1] Hanatani made her WTA Tour debut at the 2021 Tennis in the Land, after entering the singles main draw as a lucky loser.

She reached the second round, after Anna Blinkova retired after just one game,[2] but lost her second-round match against Kateřina Siniaková without winning a game.

This biographical article relating to Japanese tennis is a stub.