#4 is the debut studio album by the Japanese rock band, Ling Tosite Sigure. It was released on November 9, 2005 under Nakano Records label.
Almost exactly 15 years after the release of #4, the band released a remastered version on November 11, 2020 titled #4 -Retornado- (or #4 -Retornade-).
All tracks written and composed by TK.