#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.

[1] 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-[2]).

All tracks written and composed by TK.

[3]