Back-On (stylized as BACK-ON) is a Japanese rock band from Tokyo, Japan. They are recognized for creating anime and game opening themes such as the Tales of the World: Radiant Mythology 2 opening theme, "fly away"; Air Gear opening theme, "Chain"; Murder Princess opening theme "Hikari Sasuhou (fk Metal ver.)" and Eyeshield 21s "Blaze Line". etc., although they have also written ending themes for both anime and TV shows.