Nine universes of the previous Kamen Riders from the Heisei era are merging into one, something that would destroy all the worlds. To prevent this, Tsukasa Kadoya transforms into Kamen Rider Decade and is told that to protect his own world he must travel to all of the other Kamen Riders' worlds (Another Rider's worlds) and eliminate the anomalies in those worlds. Along the way, confronting the mysterious Narutaki and the thief Daiki Kaito, they are joined by Yusuke Onodera of the World of Kuuga and Kivala of the World of Kiva.
Masahiro Inoue
门矢士
Ryouta Murai
小野寺雄介
Kimito Totani
海东大树
Kanna Mori
光夏海
Tori Matsuzaka
Takeru Shiba / Shinken Red
Hiroki Aiba
Ryunosuke Ikenami / Shinken Blue
Rin Takanashi
Mako Shiraishi / Shinken Pink
Shôgo Suzuki
Chiaki Tani / Shinken Green
Suzuka Morita
Kotoha Hanaori / Shinken Yellow
Hyakujuu Sentai Gaoranger75%
Ultraman83%
Choujuu Sentai Liveman83%
The Green Hornet73%
Street Hawk69%
Power Rangers70%
The Young Indiana Jones Chronicles65%
Thunderbirds75%
MegaMan NT Warrior78%
Monster Hunter Stories: Ride On79%
Star Wars: Clone Wars77%
Land of the Giants67%
Initial D80%
Thunderbirds Are Go!62%
Hercules: The Legendary Journeys69%
The Heroic Legend of Arslan70%
Dengeki Sentai Changeman83%
Digimon Adventure:75%
Madan Senki Ryukendo84%
RahXephon73%
