This article is about a/an episode in Kamen Rider Zi-O.

Back to 2068 (バック・トゥ・2068 Bakku tu Nisen-rokujūhachi) is the fifteenth episode of Kamen Rider Zi-O. It features the first appearance of Oma Zi-O since episode 1. It also features the debut of Decade Build.

This episode is accompanied by the fifteenth episode of Kamen Rider Zi-O: Supplementary Plan web series, Supplementary Plan Forever (Part I).


Why does Sougo want to become a king in the first place? Sougo starts to tell Tsukuyomi about the continuous dreams he's been having. Just then, a giant event, just like the one in Sougo's dream, suddenly starts to manifest! A giant mecha suddenly appears in the sky! The demonic king's servant from the future, Kasshin suddenly appears! And thanks to Decade's intervention during their fight, Sougo gets blown 50 years into the future...!


"According to this book, average high schooler Sougo Tokiwa embarks on a path which leads him to become the demonic king of time, Oma Zi-O. In order to prevent this, Geiz and Tsukuyomi travel to the present. But Sougo Tokiwa declares that he will become the greatest, most beloved demon king and so he continues to gather the powers of the riders. However, that confidence of his will soon be shaken once he confronts himself, having became Oma Zi-O. Oh dear, I've read too far again..."


Guest Casts

Suit Actors

Forms and Collectibles Used


Rider Cards

  • Card Used:
    • Kamen Ride: Decade, Build
    • Attack Ride: N/A
    • Form Ride: N/A
    • Final Form Ride: N/A
    • Final Attack Ride: Build
    • Final Kamen Ride: N/A
    • K-Touch: N/A
  • Forms:
    • Decade, Decade Build RabbitTank Form


  • to be added


Zi-O EP15 CS
  • Closing Screen Ridewatches:
    • Kamen Rider: Zi-O and Geiz
    • Ridewatches:
      • Zi-O: Zi-O, Decade
      • Geiz: Geiz
  • Count at episode end
    • Watches in Zi-O's possession: Zi-O, Build, Ex-Aid, Fourze, OOO, OOO Tadajol Combo, Gaim, Kodama, Taka, W, Kuuga, Ghost, Decade, Phone, Bike
    • Watches in Geiz's possession: Geiz, Cross-Z, Drive, Faiz, Wizard, Genm, Phone, Bike
    • Watches in Tsukuyomi's possession: Phone
    • Watches in Oma Zi-O's possession (At Least): Kuuga, Kiva, Ryuki
  • This is the first episode that Tsukasa transforms into Decade's default form in Zi-O.
  • This is the first episode of the series to not be a tribute episode, however it does feature the appearance of a past Rider.
  • For unknown reasons (either a production error, or a new function of Neo Decadriver), Decade needs to use KamenRide: Decade card to transform back to his default form. In previous appearances, Decade could simply do that on his own.
  • The clash between Zi-O and Oma Zi-O utilizes three Ride Watches in the exact order Decade visited their respective Riders: Kuuga, Kiva, and then Ryuki.

External links