Icon-den-o.png This article is about a/an transformation item in Kamen Rider Den-O.

Zeronos Cards (ゼロノスカード Zeronosu Kādo) are a transformation card item used by Yuto Sakurai, also known as Kamen Rider Zeronos. These cards allow him to access his different forms. Unlike the Rider Pass, each Zeronos Card has a limited number of times it can be used. Once a Zeronos Card's energy is depleted, it dissolves upon removal from the belt.

The Zeronos Cards are made from the memories of the older Yuto's existence. As a result, when a Zeronos card is used up, an individual who knew the older Yuto will lose those memories, forgetting him entirely. Thus, if they're completely exhausted, Yuto risks ceasing to exist in the minds of people who are not Singularity Points. He later receives a set of red Zeronos Cards from his future that use other people's memories of his younger self to change into Zero Form. These cards rust away into nothing after being used up, and cause people to lose any memory related to the younger Yuto.

Although seemingly used up at the end of the series, as more people continue to meet and remember Yuto, he begins to resupply his stock of Zeronos cards both green and red, allowing him to continue acting as Zeronos.

In Kamen Rider Den-O: I'm Born!, Yuto demonstrated that Zeronos cards can be used in place of a Rider Pass to traverse time by inserting them into the Rider Pass slot of his Machine ZeroHorn.


  • Both green and red Zeronos cards have an identical yellow opposite side. With green cards, Yuto is able to use the yellow side to transform into Kamen Rider Zeronos Vega Form. It was never shown what might possibly happen if the yellow side of a red card was used however.
Icon-den-o.png Kamen Rider Den-O
Kamen Riders
Ryotaro Nogami - Yuto Sakurai - Past Man - Kotaro - Kotaro Nogami - Gaoh - Negataros - Ghost Imagin - Shiro - Kuchihiko - Mimihiko - Reiji Kurosaki - Eve - Anna
Transformation Devices
Den-O Belt - Rider Pass - K-Taros - Zeronos Belt - Zeronos Cards - New Den-O Belt - Gaoh Belt - Yuuki Belt - Golden Khakkhara - Pure Silver Metal Stick - G Den-O Belt
DenGasher - DenKamen Sword - ZeroGasher - Denebick Buster - DenGasher (New Den-O) - GaohGasher - Nega DenGasher - Momotarosword - Uratarod - Kintaros Ax - Ryuvolver - Ghost Imagin's sword - Shiro's Whip - Shiro's tops - SavageGasher - Golden Khakkhara - Pure Silver Metal Stick - DenGasher (G Den-O)
Rider Machines
Machine Den-Bird - Machine ZeroHorn - Machine GaohStriker - Machine Nega DenBird - Machine New Den-Bird
Time Transports
DenLiner - ZeroLiner - KingLiner - New DenLiner - GaohLiner - Nega DenLiner - Ghost Train - Battleship of Oni
The Ally Imagin and the Support Characters
The Taros: Momotaros - Urataros - Kintaros - Ryutaros

Other: Sieg - Deneb - Teddy - Futaros

DenLiner: Owner - Naomi - Hana - Stationmaster
Milk Dipper: Airi Nogami - Seigi Ozaki - Isse Miura
The Imagin
Contract holders
Kai - Death Imagin
Bat Imagin - Chameleon Imagin - Crust Imagin - Crow Imagin - Rhino Imagin - Ivy Imagin - Owl Imagin - Whale Imagin - Wolf Imagin - Jelly Imagin - Tortoise Imagin - Scorpion Imagin - Spider Imagin - Bloodsucker Imagin - Molech Imagin - Cobra Imagin - Salamander Imagin - Gecko Imagin - Newt Imagin - Wasp Imagin - Bluebird Imagin - Rabbit Imagin - Anthopper Imagin - Kraken Imagin - Mole Imagin - Leo Imagin - Pandarabbit Imagin - Snail Imagin - Oct Imagin - Armadillo Imagin - Albinoleo Imagin - Snowman Imagin - New Mole Imagin - Pink Rabbit Imagin - Clown Imagin - Ghost Imagin - Phantom Imagin - Shadow Imagin - Piggies Imagin - Mantis Imagin

Other: Gelnewt

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