Matsuko Mawatari (馬渡松子) is a Japanese songwriter. She is known for having written "Hohoemi no Bakudan" (Smile Bomb), which is the opening theme for the anime Yu Yu Hakusho. She also sang a few other songs from the same anime, and such are: Sayonara Bye Bye, Homework ga Owaranai, and Daydream Generation.