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Cho Kamen Rider Den-O & Decade Neo Generations the Movie: The Onigashima Warship is the fourth tokusatsu superhero film adaptation of the popular Kamen Rider Series Kamen Rider Den-O, following Kamen Rider Den-O: I'm Born!, Kamen Rider Den-O & Kiva: Climax Deka, and Saraba Kamen Rider Den-O: Final Countdown. The Onigashima Warship is the first of the films to be part of the Cho-Den-O Series, a new multimedia franchise featuring the characters of Den-O and many new characters. It opened in theaters on May 1, 2009. In its first week in theaters, it opened at #4, after GOEMON at #3, Red Cliff Part II at #2, and Detective Conan: The Raven Chaser at #1. Like its previous film Kamen Rider Den-O & Kiva: Climax Deka, its plot focuses more on Cho Den-O, although the characters of Decade give support to them.