Right after their first two Japanese maxi singlesKokoro andDistance, SS501 released their first full-length Japanese self-titled album,SS501 on October 24, 2007, byPony Canyon.[2]
The album consists of eleven songs: two singles from their first two maxi singles, "Kokoro" and "Distance"; two Japanese versions of "Again" and "4Chance" from theirS.T 01 Now Korean studio album; and seven new songs.[3]