This article is about a/an villain Rider in Kamen Rider Zi-O.
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"You cannot possibly defeat me. Do you know why? Because I was born to be king."
―Oma Zi-O's declaration of his ironfist rule in 2068.[src]

In 2068, Oma Zi-O (オーマジオウ Ōma Jiō) rules the Earth's civilization, referred to as the Demon King (魔王 Ma Ō) by Tsukuyomi.


It is believed that Sougo Tokiwa, with his desire to become a king, is the identity of Oma Zi-O.[1] Upon gaining his power, Oma Zi-O sent the world into destruction.


From what little is known about him, Oma Zi-O is shown to be very arrogant due to his tremendous power, proclaiming that he was chosen to be the ruler of the world from birth. He does not even view the resistance fighters as serious threats.

Powers & Abilities

  • Disintegration: Oma Zi-O can send out a powerful wave of energy that can disintegrate anything in its path.
  • Enhanced Awareness: Oma Zi-O immediately sensed and identified the threat of incoming missiles.
  • Velocity Manipulation: It is shown that Oma Zi-O can freeze dozens of missiles.
  • Time Manipulation: Oma Zi-O can freeze time before he can disintegrate enemies.
  • Telekinesis: When an army of Time Mazines tried to crush Oma Zi-O, he simply used telekinesis to hurl them into each other.
  • Legend Riders' Powers: Oma Zi-O has the powers of all the Riders prior to the year 2068.[2]


Oma Zi-O
KRZiO-Oma Zi-O

Oma Zi-O

Rider Statistics

  • Rider Height:
  • Rider Weight:

Ability Parameters

  • Punching Power:
  • Kicking Power:
  • Maximum Jump Height:
  • Maximum Running Speed:

His base form's visor reads "Rider" (ライダー Raidā).


Behind The Scenes


Oma Zi-O is voiced by Rikiya Koyama (小山 力也 Koyama Rikiya), who also voiced the Ziku-Driver. His suit actor is Yasuhiko Imai (今井靖彦 Imai Yasuhiko)


The "Oma" in his name refers to Ōmagatoki (逢魔時 lit. "The hour of meeting evil spirits") in Japanese mythology and also a reversed spell of Demon King (魔王(マオー) Ma Ō).


Oma Zi-O mask closeup

A close-up of Oma Zi-O's mask.

  • In addition to his eyes being shaped like the word "Rider" (ライダー Raidā) in katakana, a trait shared with the present Zi-O, Oma Zi-O's mask is also filled with a pattern comprising the kanji for "King" ( Ō), further symbolizing his nature as the Demon King.
    • Furthermore, his katakana visor is also altered to be shaped like an eagle.
      • The eagle shape of his visor might be a reference to the logo of the first Kamen Rider's first enemy Shocker.
  • The Rider's background takes elements from past dark counterparts:
    • A future ruler like Kamen Rider Dark Kiva, but more evil like the original Dark Kiva.
    • A supposedly predestined fate as a destructive force like Kamen Rider Decade.
    • Appears as a more regal version of the main Rider like Kamen Rider Cronus with Ex-Aid (and Genm as well, due to him being a recolor of Ex-Aid).
    • Being a 'Dark Rider' counterpart of the original titular Rider, Oma Zi-O happens to share the same color schemes as another villainous red-eyed golden Rider before him, Kamen Rider Gold Drive.
    • Oma Zi-O's rider design is similar to Kamen Rider Sorcerer. Both of their names (オーマ (Ōma)) are being shared and also both are tyrants who killed many victims (Citizens of Magic Land for Orma and Resistance fighters for Zi-O).
    • Being an evil version of Zi-O who is from the future is similar to Kamen Rider Dark Drive who is also from the future.
    • He is also his voice actor’s third evil Rider role since both Kamen Rider Bujin Gaim and Kamen Rider Dark Drive.
      • Unlike the previous two, Oma Zi-O is the first one to be a series Rider instead of a Movie-exclusive Rider.
    • Like Kamen Rider Evol, Oma Zi-O's voice actor also voiced the character and the driver.
    • Oma Zi-O's shoulder pads bear resemblance to the 'wings' of the Mirror World entity, Odin, along with his Contract Monster, Goldphoenix.
  • As Oma Zi-O is considered a darker, regal version of Zi-O, it is appropriate that the armor further emphasizes the watch-based elements, with said devices being used as accents on the helmet, trophies on the chest, with a gold watch strap as a bandolier and a large set of hour and minute hands on the back arranged like a cape.


See Also


Sougo Tokiwa - Geiz Myoukouin - Oma Zi-O - Woz
Future Kamen Riders

Kamen Rider Shinobi - Kamen Rider Quiz - Kamen Rider Kikai

Ridewatches - Ziku-Driver - Miridewatches - BeyonDriver - Zikan Girade - Zikan Zax - Ride HeiSaber - Zikan Despear - Saikyo Girade - Zikan Zaclaw - Faizphone X - Taka Watchroid - Kodama Suika Arms - Ride Striker - Time Mazine
Rider Armors - Ridewatch Holder - Great Calamity Coming Calendar - Time Break/Burst
Kujigoji-do: Geiz Myoukouin - Tsukuyomi - Junichiro Tokiwa
Resistance: Resistance Captain
555: Takumi Inui - Masato Kusaka
OOO: Eiji Hino
Fourze: Gentaro Kisaragi
Wizard: Kosuke Nitoh
Gaim: Kouta Kazuraba - Kaito Kumon
Ex-Aid: Emu Hojo - Hiiro Kagami - Kuroto Dan
Build: Sento Kiryu - Ryuga Banjo
Chuta Ohsugi - Daita Kondou - Chikao Nezu - Hina Izumi
Sworz - Heure - Ora
Movie Exclusive
Another Build - Another Ex-Aid - Another Fourze - Another Faiz - Another Wizard - Another OOO - Another Gaim - Another Den-O - Another Double
Other Villains
Imagins: Futaros