Minako Kotobuki (寿 美菜子, Kotobuki Minako, born September 17, 1991) is a Japanese voice actress and singer from Hyōgo Prefecture. She is best known for her role as Tsumugi Kotobuki in the anime series K-On! about a high school girl band. The show launched her music career as she performed the opening and ending themes and joined the three other voice actresses as the music group Sphere.