What makes Days by High and Mighty Color notable?

'Days' was notable for its commercial success in Japan, debuting at number 2 on the Oricon Albums Chart. The album's title track 'Days' became a recognizable anthem, contributing to the band's rise during the mid-2000s J-rock wave and influencing subsequent artists in the genre. Released on August 17, 2005, 'Days' marked High and Mighty Color's debut album, establishing them as a significant presence in the J-pop scene. The band had gained attention for their energetic performances and unique sound that blended rock with pop elements, setting the stage for their future successes.