Takao Yoshioka (Japanese: 吉岡たかを, Hepburn: Yoshioka Takao) is a Japanese anime screenwriter. After leaving Shin-Ei Animation, he debuted as a screenwriter with Happy Lesson. Since Happy Lesson, he has been in charge of screenwriting for many series, some of which are Elfen Lied, Your Lie in April, High School DxD, Horimiya, and The Seven Deadly Sins: Revival of The Commandments. (Via Wikipedia)