About this season
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.
Episodes (31)
1. Rider War
Aired 25 January 2009 • 24 min
2. The World of Kuuga
Aired 1 February 2009 • 24 min
3. Transcendence
Aired 8 February 2009 • 24 min
4. Second Movement ♬ Kiva the Prince
Aired 15 February 2009 • 24 min
5. Qualifications of the Biting King
Aired 22 February 2009 • 24 min
6. Battle Trial: Ryuki World
Aired 1 March 2009 • 24 min
7. The True Culprit's Super Trick
Aired 8 March 2009 • 24 min
8. Welcome to Blade Cafeteria
Aired 15 March 2009 • 24 min
9. Blade Blade
Aired 22 March 2009 • 24 min
10. Phantom Thief of Faiz Academy
Aired 29 March 2009 • 24 min
11. 555 Faces, 1 Treasure
Aired 5 April 2009 • 24 min
12. Reunion: Project Agito
Aired 12 April 2009 • 24 min
13. Awaken: The Soul Tornado
Aired 19 April 2009 • 24 min
14. Super Den-O Beginning
Aired 26 April 2009 • 24 min
15. Here Comes Super Momotaros!
Aired 3 May 2009 • 24 min
16. Warning: Kabuto is Out of Control
Aired 10 May 2009 • 24 min
17. The Path of Grandmother's Flavor
Aired 17 May 2009 • 24 min
18. Missing Hibiki
Aired 24 May 2009 • 24 min
19. Journey's End
Aired 31 May 2009 • 24 min
20. The Dark Riders of Nega World
Aired 7 June 2009 • 24 min
21. Going Through the Complete Rider Album
Aired 14 June 2009 • 24 min
22. Diend is Wanted
Aired 28 June 2009 • 24 min
23. End of Diend
Aired 5 July 2009 • 24 min
24. The Samurai Squadron Appears
Aired 12 July 2009 • 24 min
25. Corrupt Rider, Go Forth!
Aired 19 July 2009 • 24 min
26. RX! Great-Shocker Invasion
Aired 26 July 2009 • 24 min
27. BLACK×BLACK RX
Aired 2 August 2009 • 24 min
28. Amazon, Friend
Aired 9 August 2009 • 24 min
29. The Strong Naked Strongman
Aired 16 August 2009 • 24 min
30. Rider War: Prologue
Aired 23 August 2009 • 24 min
31. The Destroyer of Worlds
Aired 30 August 2009 • 24 min