Kamen Rider Den-O & Kiva the Movie: Climax Deka is a Japanese superhero tokusatsu film in the Kamen Rider franchise. Climax Deka is the second film to feature the characters of the television drama Kamen Rider Den-O and the first to feature the characters of Kamen Rider Kiva. It opened in theaters on April 12, 2008 as part of the Kamen Rider Spring Festival . In its first weekend, it took the top spot at the Japanese box offices, unseating the Japanese release of Cloverfield. In the end, it grossed 730 million yen, over double the normal revenue for a Kamen Rider film. Though it is considered the first Heisei rider teamup however the story focuses more on Den-O than Kiva.

The Kamen Rider Series , also known as Masked Rider Series, is a Japanese superhero media franchise consisting of tokusatsu television programs, films, manga, and anime, created by manga artist Shotaro Ishinomori. Kamen Rider media generally features a motorcycle-riding superhero with an insect motif who fights supervillains, often known as kaijin .