Gackt Camui (神威 楽斗, Kamui Gakuto?, born July 4, 1973) is a Japanese musician, actor and author. Usually referred to by his mononymous stage name, he is known for his career as a solo artist and as the former vocalist for the defunct band Malice Mizer.
He has released fourteen albums and thirty-eight singles as a solo musician, which have sold over 10 million copies in Japan. His single "Returner ~Yami no Shūen~", released on June 20, 2007, was his first and only single to reach the number one spot on the Oricon charts. He became the first Japanese artist to release his music catalog on iTunes in October 2007. His music has been used as theme songs for various anime, television dramas, and video games, such as New Fist of the North Star, Dirge of Cerberus: Final Fantasy VII, and Kamen Rider Decade, amongst others.
As an actor and writer, he co-starred and co-wrote the 2003 film Moon Child and acted in the NHK drama Fūrin Kazan as Uesugi Kenshin. He made his international film debut in the film Bunraku in 2010 at the Toronto International Film Festival.