Gackt's 30th single「Journey through the Decade」includes theme song to the sci-fi/live action series "Kamen Rider Decade". Unlike the majority of Gackt's work, the song's lyrics are written by Shoko Fujibayashi, it was composed by Ryo, and arranged by Ryo and Kōtarō Nakagawa. On its first day of release, it sold 15,000 copies and reached #2 on the Oricon Daily Charts. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.