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.
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Episode 1
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
Episode 11
Episode 12
Episode 13
Episode 14
Episode 15
Episode 16
Episode 17
Episode 18
Episode 19
Episode 20
Episode 21
Episode 22
Episode 23
Episode 24
Episode 25
Episode 26
Episode 27
Episode 28
Episode 29
Episode 30
Episode 31
Episode 32
Episode 33
Episode 34
Episode 35
Rider war
The world of kuuga
Transcendence
Second movement ♬ kiva the prince
Qualifications of the biting king
Battle trial: ryuki world
The true culprit's super trick
Welcome to blade cafeteria
Blade blade
Phantom thief of faiz academy
555 faces, 1 treasure
Reunion: project agito
Awaken: the soul tornado
Super den-o beginning
Here comes super momotaros!
Warning: kabuto is out of control
The path of grandmother's flavor
Missing hibiki
Journey's end
The dark riders of nega world
Going through the complete rider album
Diend is wanted
End of diend
The samurai squadron appears
Corrupt rider, go forth!
Rx! great-shocker invasion
Black×black rx
Amazon, friend
The strong naked strongman
Rider war: prologue
The destroyer of worlds
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