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.