Ozma did record original songs, mostly coming on the later albums. In late 2008, Ozma collaborated with Ravex on the song "I Rave U" as part of the 20th anniversary of the Avex Group Record Label, having just switched from Universal Music Japan to join Avex in September of that year. Several of Ozma's original songs became movie theme songs: "Lie-Lie-Lie" was used for Naruto Shippuden the Movie, "Ninkimono de Ikou!" for , and "Masurao" for Mr. Tadano's Secret Mission: From Japan with Love.