Nine Heisei Riders (Original)

The original Nine Heisei Riders are the protagonist Kamen Riders of the first nine shows of the Heisei era Kamen Rider Series. They return at various points and in varying numbers in Kamen Rider Decade where they give Tsukasa Kadoya the mission to save the multiverse by becoming the tenth Heisei Rider, Decade. He starts his journey by travelling across the Nine Worlds, meeting alternate versions of the Nine Heisei Riders in their respective worlds.

History
to be added

Returning actors
Of the Nine Heisei Riders, only four actors reprised their original roles in Kamen Rider Decade.
 * Koji Seto who reprised his role as Wataru Kurenai (Kamen Rider Kiva) in the first and last episodes as well as the epilogue movie Kamen Rider Decade: The Last Story, part of Kamen Rider × Kamen Rider W & Decade: Movie War 2010.
 * Takayuki Tsubaki who reprised his role as Kazuma Kenzaki (Kamen Rider Blade) in the penultimate and last episodes as well as a voice-only cameo in Kamen Rider Decade: The Last Story.
 * Toshiki Kashu who reprised his role as Shouichi Tsugami (Kamen Rider Agito) in Kamen Rider Decade: All Riders vs. Dai-Shocker.
 * Toshihiko Seki who reprised his voice role as Momotaros (Kamen Rider Den-O) in the World of Den-O two-parter (as well as Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship), All Riders vs. Dai-Shocker, and Movie War 2010.