"Break the Chain" is a song by Japanese rock band Tourbillon, and was the band's fifth and final single. It was released a year-and-a-half following the release of their second album A Tide of New Era, and was used as the opening theme for the 2008 television series Kamen Rider Kiva. Ryuichi Kawamura stated that the song was not just the "let's beat up the bad guys!" kind of Kamen Rider Series opening theme, but a song that both children and adults can enjoy.