[3] In 2022, she reached the final of the Osaka Mayor's Cup, but lost to compatriot Sara Saito.

[4] In July 2024, she and compatriot Naho Sato won the doubles title at the Figueira da Foz International Ladies Open.

[5] The following month, she made her WTA Tour debut after qualifying for Tennis in the Land.

She then recorded her first WTA Tour wins over compatriot and lucky loser Sara Saito[8][9][10] and qualifier Zeynep Sönmez to reach her first WTA 500-level quarterfinal.

[11][12][13][14] Ishii withdrew with an abdominal injury before her last eight match with sixth seed Diana Shnaider.