Dai Nagao
Secret is the eighth studio album by Japanese singer-songwriter Ayumi Hamasaki, released November 29, 2006 by Avex Trax. As with all of her previous works, Hamasaki wrote all of the lyrics on "Secret". The album's composition was handled largely by Dai Nagao and Tetsuya Yukumi, both of whom were frequent collaborators with Hamasaki. Generally a rock-pop influenced album, Hamasaki said that the meaning of the album was itself a secret, and that it incorporated secrets she was keeping about herself that the public did not know.