Decade 1998–2002 (stylized DECADE 1998-2002) is a compilation album by Dir En Grey, released on December 19, 2007. It was published simultaneously alongside Decade 2003–2007, to commemorate Dir En Grey's tenth anniversary as a band and comprises previous singles, B-sides and album tracks. All of the songs on the album are remastered by Kotaru Kojima with some of the original songs' intros and outros being either expanded or trimmed to accommodate the new track sequence.