18: Eighteen is the debut studio album by Nana Kitade. It was originally released August 24, 2005 in Japan. The album peaked at #16 on the Oricon chart and charted for five weeks. On September 7, Kitade held a special one-man live show, which was titled Nana Kitade Live Showcase '18: Eighteen', in Shibuya-Ax. First press editions of the album included a ticket to the live show and handshake event. On December 7, she released a DVD called Nana Kitade: 18Movies. The DVD consists of all her music videos up until this point, clips from her one-man live show, commercials for her releases, and a studio recording of "Kesenai Tsumi". The album was released in the United States on July 11, 2006 through Tofu Records due to increased popularity overseas.