What makes I.V. by X Japan notable?

'I.V.' gained significant attention as it was part of the soundtrack for the film 'Saw IV,' introducing X Japan to a broader international audience. The single's success on Japanese charts underscored the band's enduring influence in the heavy metal genre and revitalized interest in their music after years of absence. Released in 2008, 'I.V.' marked X Japan's first single after their reunion in 2007, following a long hiatus since their disbandment in the late 1990s. The band was re-establishing their presence in the music scene, transitioning from a storied history into a new era of creativity and collaboration.