She started her professional voice actress activity in 2005, and has voiced Tsumugi Kotobuki (K-On!), Karina Lyle/Blue Rose (Tiger & Bunny), Rikka Hishikawa / Cure Diamond (Dokidoki!
She has also performed as a member of voice actress unit sphere alongside Haruka Tomatsu, Ayahi Takagaki, and Aki Toyosaki.
28-year-old anime voice actress Minako Kotobuki announced on her official blog on October 16 that she will study in United Kingdom for one year from the spring of 2020.