This article is about a/an rider in Kamen Rider Kiva.
For the A.R. World version from Kamen Rider Decade, see Kamen Rider Saga (A.R. World).
"This is the final judgment from the king: Death!"
―Taiga's words to punish the Fangires who have done something he hates most.[src]

Taiga Nobori (登 太牙 Nobori Taiga) was the King of the Fangires and is Kamen Rider Saga (仮面ライダーサガ Kamen Raidā Saga, Masked Rider Saga). He later becomes Kamen Rider Dark Kiva (仮面ライダーダークキバ Kamen Raidā Dāku Kiba, Masked Rider Dark Kiva). Initially the fiance of Mio Suzuki, he learns that she becomes willing to abandon her Fangire heritage and her future as Queen of the Fangires to be together with his half-brother, Wataru Kurenai, resulting in conflicts between reunited brothers.


Kamen Rider Kiva


Taiga was born prior to 1986 as the first born son of Maya, the Queen of the Checkmate Four, and the Checkmate Four's original King. He would receive the title of King at infancy after his father's death before he was spirited away by Maya to be raised by Mamoru Shima as a human child, wearing a glove over his hand to conceal his Checkmate Four crest. It would be while as a boy that he encounters Wataru Kurenai and the two become good friends until Taiga was spirited off, his childhood being under heavy watch.

Along with learning of his true nature as the Fangire offspring of the previous King and Queen of the Checkmate Four, Taiga developed a disdain for humans as he attacks Shima, scarring his foster father's back before taking his leave. As the current King, Taiga intends to prevent the progress of humanity from moving forward to the point of becoming a problem for Fangires like with Ixa. The crime becomes even more unforgivable should the guilty party be a Fangire. When executing an opponent, he says, "The King's sentence is given. It's death!" (王の判決を言い渡す。死だ! Ō no hanketsu o iiwatasu. Shi da!).

Though his Fangire form is a mystery, he displays impressive powers such as summoning a giant shadowy mass of vipers or conjuring up the Feathered Serpent called Kukulkan (ククルカン Kukurukan) and multiple giant Sagarc under a larger Mother Sagarc (マザーサガーク Mazā Sagāku) as his support.

By 2008, Taiga founded the funding company called Development & Pioneer (D&P(ディベロープメント&パイオニア) Diberōpumento ando Paionia), which serves as a front to attract those who need funding for research of the betterment of mankind. After watching corporate testing of a new metal, Taiga meets up with his old friend Wataru as the two catch up while he meets with his arranged fiancée Mio before introducing her to Wataru without realizing their relationship, having no idea of Mio's true feelings towards Wataru until overhearing her admit them to Wataru.

Though he acts calm, it is a cover as he sees his marriage to Mio as absolute and is devastated to learn of her relation to his best friend. Although told by the Bishop to kill Wataru, Taiga refuses and instead gives Wataru an invitation to the wedding between him and Mio, explaining that he's too weak to protect her. However, tensions rise more as he and Mio learn that Wataru is the one who inherited his father's power as Kiva. After learning his mother's location, Taiga learns from her his biological relationship to Wataru as his half-brother.

With this information, Taiga decides instead of killing Wataru, he wants his brother to become their ally, having the Bishop awaken the Fangire blood within Wataru for that purpose. Believing he succeeds in winning Wataru on his side as his right-hand man, Taiga sees marrying Mio the final step to his ideal life being realized with Maya giving him his birth-right as his father's successor to Kiva's power. When Wataru informs him that he wishes to live as himself and not as either human or Fangire, Taiga is shocked and infuriated to the point of conjuring up a Mother Sagarc and her offspring to educate Wataru unsuccessfully, before confronting his half-brother. He makes several more unsuccessful attempts to bring Wataru to his side, and when refused each time, he is forced to fight him.

After an incident in which Shima is critically injured by the Sungazer Fangire, Taiga opts to save him. However, this is a front as he instead transfuses Fangire power into Shima's body, fully healing him in the process while making him into another Sungazer Fangire. At the same time, Mio accepts Taiga's marriage proposal (unaware of her own plans), and undergoes the marriage ritual with her, refusing to accept that she made an attempt on his life. When Shima confronts Taiga to fight, he fakes the fight to make it seem like he killed his stepfather in order to provoke Wataru into fighting him. After Kiva gains the upper hand on Saga, he goes in for the kill, only for Mio to intervene and take the final blow in Saga's place. The sudden interference and Mio's subsequent death leaves Taiga to vow on killing Wataru.

However, Taiga learns that it was actually the Bishop, not Wataru, who killed Mio. Enraged, Taiga beats the Bishop to a bloody pulp before the Fangire runs off, now seeing Taiga unworthy to be his King. Later, Taiga encounters Wataru when dropping off flowers at Mio's gravesite, revealing the truth to him before he accepts Wataru's challenge. However, the battle is interrupted by the Bishop who brings an army of revived Fangires to ambush Saga in an act of vengeance.

Kiva and others

After he was defeated by Kiva, Taiga loses his standing among his Fangire peers as Wataru becomes the new King of the Fangires in his place. Refusing to let this happen, Taiga knocks out Maya in a fit of rage in an attempt to acquire the power of Dark Kiva. He would then use said power to settle things with Wataru once and for all, but in the end, he learns the truth from Shima of Wataru`s actions and helps him fight the revived Bat Fangire. Taiga and Wataru eventually fight each other one last time with the title the Fangire King after defeating the Bat Fangire at the behest of Maya who turned out to be alive. The outcome of their battle was not shown. After regaining his position as D&P's president and presenting a plan to find an alternate source of energy for the Fangires to thrive on, Taiga meets up with Wataru and his future nephew Masaru as they join up with the others to fight the Neo-Fangire.

S.I.C. Hero Saga

King of Vampire

66391013 463971034436742 3893459111626407936 n

based on Kamen Rider Kiva. The story follows the life of the characters following the finale while expanding on other instances in the history of the 1986 storyline.

At Nago and Megumi’s wedding Kivat’s sister, Kiva-la suddenly arrives warning them that the Lion Fangire has become a giant Sabbat. And so as Wataru become Kiva Emperor, Nago Ixa Rising and Taiga Dark Kiva, Kiva-la agrees to help Megumi fight, transforming her into Kamen Rider Kiva-la to fight the Sabbat

Kamen Rider Decade

Super Den-O Beginning


Kamen Rider Saga in the World of Den-O

Kamen Rider Saga appears summon with Sasword by Kamen Rider Diend, to fight Momotaros that possessed Yusuke, later they start focusing their rage on Den-O. Super Den-O Beginning

Here Comes Super Momotaros!


Kamen Rider Saga ,Sasword and Diend vs Den-O

Kamen Rider Saga reappears with Sasword and Diend continuing the battle, dominating Den-O, finished Diend with Final Attack Rider to Den-O Sword Form defeating him. Here Comes Super Momotaros!

OOO, Den-O, All Riders: Let's Go Kamen Riders

Kamen Rider Saga in Legend War

Kamen Rider Saga was part of a group of reinforcement riders led by Akira Date/Kamen Rider Birth to aid the primary riders in defeating the Rock Great Leader. All the Kamen Riders got on their bikes and performed the powerful All Rider Break attack which destroyed the Great Leader. OOO, Den-O, All Riders: Let's Go Kamen Riders

Appearances in other media

Kamen Rider Decade: All Riders Super Spin-off

That One! Eitoku: Beware of Eito-kun?


Kamen Rider Saga appears withalong Rey, KickHopper, Diend and Den-O Rod Form, cited as examples of the costumes worn by Eitoku, later in the beginning of the questionnaire and Kenichi asks which Rider is Eitoku, referring to those Riders, it is finally discovered that it is Saga.

Video Game Appearances

Kamen Rider Super Climax Heroes


Kamen Rider Saga is an unlockable and playable character with the other Kamen Riders in Super Climax Heroes.

All Kamen Rider: Rider Revolution


to be added

Kamen Rider Battle Ganbaride


Kamen Rider Saga card

Kamen Rider Saga appears as a playable character in this video game Kamen Rider Battle Ganbaride.

Kamen Rider Battle: Ganbarizing


Kamen Rider Saga Card

Kamen Rider Saga is a playabled character in Kamen Rider Battle Ganbarizing..

Kamen Rider Buttobasoul


Kamen Rider Saga Medal

Kamen Rider Saga is a playable character in Kamen Rider Buttobasoul.


Kamen Rider: Battride War Genesis


Kamen Rider Dark Kiva in Battride War Genesis.

Kamen Rider Dark Kiva made his debut in the video game Kamen Rider: Battride War Genesis, not as a playable character but a tag partner.

Other Game appearances

Battle Spirits


Kamen Rider Saga Battle Spirits

Kamen Rider Saga appears with other Kamen Riders and Monters in Battle Spirits.



As the offspring of the Fangire King and Maya, Taiga has inherited some parts of their personality and powers. While mostly cool and calm like the both of them, he is also capable of having a fiery temper like his father. He was also very commanding, arrogant and proud of his status as the King of Fangires. Unlike his father who tried to show no emotion concerning love though, Taiga was somewhat the opposite.

Taiga originally hated most humans (aside from Wataru whom he later found out was his half brother) because of his past with them and saw them as livestock like most Fangires. He also originally tried to prevent the humans from evolving and becoming a threat to Fangires. It was presumably this side of his personality which led to him having a falling out with both Mio and Wataru.

Although somewhat sharp, he can sometimes be oblivious as well. When he lost almost everything, Taiga showed a desperate side and went to Maya despite his earlier comments about her, hinting a helpless side as well. Despite these faults, Taiga wasn't truly evil and showed some loyalty towards others he cared about. He also cared about Maya and Shima despite holding a grudge against the both of them. As Shima stated later on, Taiga actually has some kindness in his heart which he showed from time to time. He also showed guilt and repentance when he knocked out Maya to steal Kivat-bat the 2nd. After changing for the better thanks to Wataru, Taiga became more accepting of other species and created a project which will nourish the Fangires (and presumably the rest of the Demon Races which require life energy) without human life energy. he also seemingly became more humble and kind.



Taiga's Fangire nature

With his Fangire powers, Taiga has rather impressive powers related to snakes. This potential was noted by Bishop himself who has stated Taiga's powers to be around 1st or 2nd place even out of all the previous Fangire Kings. Even as Saga, Taiga had enormous power and initially overpowered Wataru as Kiva Emperor Form. After Wataru became more mature and confident, Taiga soon found himself the weaker of the two. This gap mostly closed up when he gained Kivat-bat the 2nd, although he seemed unable to use it as effectively as both his predecessors.



Kamen Rider Saga

―Sagarc's Transformation announcement[src]


  • Rider height: 205 cm[1]
  • Rider weight: 110 kg[1]
  • Ability perameters
    • Punching power: 12 t.[1]
    • Kicking power: 35 t. [1]
    • Finisher Power (Snaking Death-Break): 40 t.[1]
    • Maximum jump height: 90 m. [1]
    • Maximum running speed: 100 m. per 2 sec.[1]

Saga's only form is accessed by inserting the Jyacorder (ジャコーダー Jakōdā) into Sagarc after the Sagarc Belt is formed. Taiga usually reserves the ability to transform into Kamen Rider Saga for occasions when he, as King of the Checkmate 4, must execute a Fangire who has been deemed guilty of helping humanity.

The Jyacorder also doubles as Saga's primary, and only, weapon. In battle, it has two modes, the rapier-like Rod Mode (ロッドモード Roddo Mōdo) and the whip-like Bute Mode (ビュートモード Byūto Mōdo). Saga also uses the Jyacorder, in conjunction with his Wake Up Fuestles to perform his Snaking Death-break (スネーキングデスブレイク Sunēkingu Desubureiku) finishing attack, where he impales the target with the Jyacorder in whip mode, and hangs them until they are destroyed.

Taiga would later discard Sagarc, and his power as Saga, to partner with Kivat-Bat the 2nd and gain the power of Dark Kiva.

Kamen Rider Saga's ending theme is entitled "Roots of the King".

Appearances: Kiva Episode 32-43, 46-47, Decade Episode 14,15, OOO, Den-O, All Riders: Let's Go Kamen Riders

Dark Kiva
KR-Dark Kiva

Kamen Rider Dark Kiva

Dark Kivat's transformation announcement[src]


  • Rider Height: 205 cm[2]
  • Rider Weight: 112 kg[2]
  • Ability perameters
    • Punching power: 20 t.[2]
    • Usual kicking power: 35 t.[2]
    • Maximum jump height: 250 m.[2]
    • Maximum running speed: 100 m. per 1.2 sec.[2]

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, and has no chains on his body as Kiva needs to control his power. As Dark Kiva, Taiga retains all the powers that his father, the original King of the Checkmate Four, used in this form; Taiga, however, retains Saga's personal weapon, the Jyacorder.

As Maya would later explain, the Kiva power cannot be used by a normal human, as usage would ultimately result in death. This would prove to be true, as Otoya had used the Dark Kiva power a total of three times before finally dying due to the strain it put on his body. Shima also mentioned this when Wataru revealed his heritage to him.

Kamen Rider Dark Kiva's ending theme, entitled "Supernova" (only in the finale), also doubles as the ending theme for Kamen Rider Kiva's Emperor Form.

Appearances: Kiva Episode 47-48



  • Sagarc Belt - Transformation belt
  • Jyacorder - Personal weapon
  • Fuestles - Whistle-like devices that activate a function, depending on the Fuestle

Dark Kiva

Rider Cards

Kamen Ride Saga

Kamen Ride: Saga

Behind the scenes


Taiga Nobori is portrayed by Shouma Yamamoto (山本 匠馬 Yamamoto Shōma). Yamamoto also portrayed Takato Shiramine/Kamen Rider Rey in Kamen Rider Kiva: King of the Castle in the Demon World. As a child, he was portrayed by Yugo Kishizawa (岸澤 優吾 Kishizawa Yūgo).

As both Kamen Rider Saga and Kamen Rider Dark Kiva, his suit actor is Eitoku (永徳 Eitoku).


  • Saga resembles the king chess piece, and the suit's design also incorporates serpents (specifically the viper) and stained glass.
  • Saga's name may come from the Japanese word for "nature" or "characteristic" ( saga). The "Ga" in the name may also be based on the kanji for "Fang" () that can be also read as "Kiba"
  • Taiga's Fangire Form was never shown in the series despite being the King of the Fangires.
    • It is hinted though that he might be the Snake Fangire.
    • Since he has shown desire to have the powers of Dark Kiva, that may mean his Fangire powers are lower than it and possibly Saga which he often used instead.
  • Taiga also shared his name with Taiga NozomuIcon-crosswiki, the human host of Ultraman ZeroIcon-crosswiki.
  • As Saga, Taiga has one of the most complex finishers for a Rider.
  • Kamen Rider Saga shares his name, but is not to be confused, with an UltramanIcon-crosswiki.
  • Snaking Death Break might be a homage to how Shamisen no Yuji from the 1981 TV series Shin Hissatsu Shigotonin kills various enemies.
  • Taiga & Wataru Kurenai are the first two Riders who are blood brothers, later followed by Takatora & Mitsuzane Kureshima who become the first two Riders to be full brothers.
  • In the final battle against Bat Fangire, it seems that Taiga is unaware that Bat Fangire is in fact his father, and had been trying to used Taiga for his ambition at first, then changed his mind to kill Taiga and Maya for being worthless to him. Ironically, Taiga was the one who killed his father for good when he was an infant in 1986, prior his father's revival during a final battle against him in 2008.
  • This is first belt in the Heisei period that spins, the other is the Drive Driver.
  • Kamen Rider Saga's ending theme is entitled "Roots of the King".


See Also


  1. "TV Asahi's page for Kamen Rider Saga". Retrieved 2009-06-27.
  2. "TV Asahi's page for the Saga Persona". Retrieved 2009-06-27.
  3. "TV Asahi's page for the Sagarc Belt and the Jacoder". Retrieved 2009-06-27.
  4. "チェックメイトフォーのキングであり、仮面ライダーサガの登 太牙(山本 匠馬)が普段乗っているバイクは何ですか?". Retrieved 2008-11-20.
Wataru Kurenai - Kivat-bat the 3rd - Demon Imperial Dragon Tatsulot - Castle Doran - Shoodoran
The Arms Monsters: Jiro - Ramon - Riki
Gear: Kivat Belt - Fuestles - Demon Imperial Sword Zanvat Sword - Machine Kivaa
2008: Mamoru Shima - Keisuke Nago - Kengo Eritate - Megumi Aso
1986: Otoya Kurenai - Yuri Aso
The Fangires
The Checkmate Four:
1986: Queen I - King I
2008: Bishop - Rook - King II - Queen II
Pawns: Horse Fangire - Octopus Fangire - Moth Fangire - Sheep Fangire - Ryo Itoya - Prawn Fangire - Frog Fangire - Earwig Fangire - Rhinoceros Fangire - Seastar Fangire - Ladybug Fangire - Chameleon Fangire - Grizzly Fangire - Shark Fangire - Crab Fangire - Cicada Fangire - Warthog Fangire - Moose Fangire - Horsefly Fangire - Rat Fangire - Mantis Fangire - Seamoon Fangire - Silkmoth Fangire - Polar Bear Fangire
Takato Shiramine - Takashi Sugimura
Mummy Legendorga - Medusa Legendorga - Mandrake Legendorga - Gargoyle Legendorga - Antlion Legendorga
View • [Edit]
Community content is available under CC-BY-SA unless otherwise noted.