This article is about a/an rider in Kamen Rider Decade.
For the original version, see Otoya Kurenai.

Otoya Kurenai (紅 音也 Kurenai Otoya), also known as Kamen Rider Dark Kiva, is a alternative version of Otoya Kurenai from Nega's World.

Fictional Character Biography

Dark Kiva and the Dark Riders

Otoya with his Dark Riders behind him.

This Otoya shares many characteristics with his other self of the world Kiva, however, Negative Otoya is a cruel and ruthless dictator who plunged his own world into oppression under the power of his Dark Riders (Orga, Ryuga, Dark Kabuto and Alternative). He wanted Tsukasa to stay in the Nega World by giving him the K-Touch, but instead Tsukasa kills the other Dark Riders. Otoya was hiding while Tsukasa was fighting the other Dark Riders. At the end of the story arc, Otoya remains as the last Dark Rider in Nega World.

Kamen Rider Dark Kiva

Kamen Rider Dark Kiva

Kamen Rider Dark Kiva

―Dark Kivat's transformation announcement[src]
  • Rider Height: 205cm
  • Rider Weight: 112kg
  • Ability perimeters
    • Punching power: 20 t.
    • Usual kicking power: 35 t.
    • Maximum jump height: 250 m.
    • Maximum running speed: 100 m. per 1.2 sec.

Dark Kiva only appears to have one form, similar to that of Kiva Emperor Form in black and red. However, Dark Kiva does not require the use of a being such as Tatsulot to achieve this form. As Dark Kiva, Otoya has access to a unlimited potential of power that is hindered within his successor such as telekinesis and the use of the Kiva insignia as a weapon.


Dark Kivat Belt

Main article: Dark Kivat Belt

The Dark Kivat Belt ((ダークキバットベルト Dāku Kibatto Beruto) is Otoya's means of transforming into Dark Kiva.

Similar to his other self of Kamen Rider Kiva, Otoya has Kivat-bat the 2nd bite him (who in this version, does not seems to have self-awareness), and then perch upside down on the Power Roost (パワールースト Pawā Rūsuto) of the belt's Dark Kibuckle (ダークキバックル Dāku Kibakkuru) to complete the transformation, separating from the belt when certain conditions demand for it like Fuestle-blowing. The Dark Kivat Belt also has six Fueslots to hold the six Fuestles.


Main article: Fuestles

Like Kiva, Dark Kiva accesses his arsenal through whistles on his belt called Fuestles (フエッスル Fuessuru), which he gives to Kivat the 2nd to blow into to evoke a power-up. Compared to Kiva's Fuestles, his predecessor's emit at a lower pitch.

  • Dark Wake Up Fuestle (ダークウエイクアップフエッスル Dāku Ueiku Appu Fuessuru): The Dark Wake Up Fuestle allows Dark Kiva to perform one of three finishing moves depending on the frequency.
    • Darkness Hell Crash (ダークネスヘルクラッシュ Dākunesu Heru Kurasshu): Referred to by Kivat-Bat the 2nd as "Wake Up One," the Darkness Hell Crash is a punch with the force of 65t. When performed, day turns into night with blood red fog. Dark Kiva then does a flying punch with his right arm.
    • King's Burst End (キングスバーストエンド Kingusu Bāsuto Endo): Referred to by Kivat-Bat the 2nd as "Wake Up Two," the King's Burst End is a Darkness Moon Break-style kick with the force of 180t and green energy blades.
    • King's World End (キングスワールドエンド Kingusu Wārudo Endo): Referred to by Kivat-Bat the 2nd as "Wake Up Three," a self-destructing dynamite attack with an unknown level of destructive power. As the name implies, it could destroy everyone nearby. However, it was understandibly never used.
  • Garulu-Seal Fuestle (ガルルシールフエッスル Garuru Shīru Fuessuru): This Fuestle seals Garulu by emitting a continuous sound, creating an energy sphere that captures Garulu and converts him into the Garulu Saber.
  • Basshaa-Seal Fuestle (バッシャーシールフエッスル Basshā Shīru Fuessuru): This Fuestle seals Basshaa by emitting a continuous sound, creating a energy sphere that captures Basshaa and converts him into the Basshaa Magnum.
  • Dogga-Seal Fuestle (ドッガシールフエッスル Dogga Shīru Fuessuru): This Fuestle seals Dogga by emitting a continuous sound, creating a energy sphere that captures Dogga and converts him into the Dogga Hammer.
  • Doran Fuestle (ドランフエッスル Doran Fuessuru): This Fuestle summons Castle Doran. However it was never used.
  • Buroon Fuestle (ブロンフエッスル Buron Fuessuru): This Fuestle summons Buroon from Castle Doran. However it was also never used.



  • While the original Otoya was Wataru's father, Otoya does not exist in the World of Kiva because that world's Wataru had a human mother and Fangire father as opposed to a human father and Fangire mother.
  • Unlike the original Otoya of Kamen Rider Kiva, this Otoya did not die after transforming into Dark Kiva, indicating that he may possibly be a Fangire, or perhaps he died off screen. His status is unknown.
  • It is more likely, however, that he is immune to Dark Kiva's drawbacks as the original Otoya only transformed out of desperation, whereas this Otoya did it rather nonchalantly.
  • Coincidentally, the number of times he and his original counterpart transformed are the same: three.