[2] Aspiring to become a voice actress since early in her life, she enrolled at the Japan Narration Actor Institute (日本ナレーション演技研究所).
[3] She debuted as a voice actress in 2017, playing background and minor roles in anime series such as Love Live!
[6] She would then voice background characters in series such as Ms. Koizumi Loves Ramen Noodles, Citrus, and Slow Start.
[3] In 2018, Okasaki played her first main role as the character Miku Nishino in the anime series Ongaku Shōjo.
[2] On July 1, 2021, she made her solo singer debut under King Records[11] with her first single released on September 15, 2021.