Kamen Rider W
is the second film adaptation of the "Kamen Rider W" television series, directed by Koichi Sakamoto and released in Japanese theaters on August 7, 2010. It was filmed in 3-D, making it the first feature length 3-D film in the Kamen Rider Series. The film's main guest star is Mitsuru Matsuoka of the band SOPHIA as the film's antagonist Kamen Rider Eternal. Other guest stars include Genki Sudo and Aya Sugimoto. Following the tradition of all Heisei period Kamen Rider movies, "Kamen Rider W Forever" was released as a double-bill with "". The protagonist of "Kamen Rider OOO" made his first appearance in the film.