This article is about a/an rider in Kamen Rider Ryuki.
For the A.R. world version from Kamen Rider Decade, see Kamen Rider Gai (A.R. World).
"You... You were supposed to make my game more fun."
―Gai's final words as Ouja betrayed him.[src]

Jun Shibaura (芝浦 淳 Shibaura Jun) was Kamen Rider Gai (仮面ライダーガイ Kamen Raidā Gai, Masked Rider Gai), a fictional character in Kamen Rider Ryuki. He was the sixth of the 13 Kamen Riders the story revolves around.


Kamen Rider Ryuki

Early life

He is a 3rd year college student at Meirin University, extremely well-versed in computers and programming to be in the Matrix Netgame Club. He joined the Rider War simply to be the winner, seeing it as nothing more than a game. Jun even used his Matrix members' thrill-seeking urge against them to fight to the death in a game similar to the Rider War while he watched from the shadows.

Encounter with Ryuki

Investigating the matter, Shinji meets Jun when he reveals to the journalist as the mastermind behind the game of death. When the Mirror Monsters arrived, they transformed and fight one of the Mirror Monsters. After defeating the monsters, however, he later attacks Ryuki and steals his Dragreder card. Iron Mask Legend

Infiltration in ORE Journal and Fight against Knight

He used both Shinji's card and uploaded a virus to the ORE Journal mainframe to blackmail their head of their company. Shimada eventually managed to wipe out his programming with her own virus, while Miyuki Tezuka stole back the Dragreder card. Card of Destiny The Grieving Knight



Gai dies from Ouja's attack

Soon after, Jun was picked up by the police for his ties to the Matrix member murders, getting his father to bail him out with Shuichi Kitaoka's aid. Jun even went so far as to reveal the true identity of the other Riders among them, impressed with Takeshi Asakura's sadistic nature. To suit that end, Jun kidnapped Yui to start a "Rider party" between him, Kamen Rider Knight, Kamen Rider Raia, and Kamen Rider Ryuki. However, in the middle of the fight, their battle gets intertwined with the one between Kamen Rider Zolda and Kamen Rider Ouja, who used Gai as a shield to take the blunt of Zolda's Final Vent before killing him with his own hands. Metalgelas was infuriated at its master's death at the hands of Kamen Rider Ouja and went after him only to fall victim to Ouja's contract card.Jailbreak Rider Rider Gathering

Time Vent

When Kamen Rider Odin uses Time Vent against Ryuki, Knight, Zolda and Ouja, later they repeat all deaths of other Riders Jun die brutally again by Veno Crash of Takeshi Asakura Time Vent (episode)

Oddly, Gai, like Kamen Rider Scissors and Kamen Rider Imperer, didn't reappear in the epilogue after Kanzaki reverted time.

Kamen Rider Decade: All Riders vs. Dai-Shocker


Kamen Rider Diend summons Kamen Rider Gai,Raia and PunchHopper in the World of Decade to fight KickHopper and Ouja .armed with the Metal Horn he and Raia figth against Ouja, but the result of the fight is not shown. Kamen Rider Decade: All Riders vs. Dai-Shocker

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

Kamen Rider Gai in Legend War

Kamen Rider Gai 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 All Rider Break attack which destroyed the Great Leader. OOO, Den-O, All Riders: Let's Go Kamen Riders

Appearances in other media

OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~

Type23. - Ice Pop! The Dragon Allocates Pace!


Kamen Rider Gai appears with Ryuki ,V3 and W,according by Kivat-Bat the 3rd Gai is consider the least compatible match.Type23. - Ice Pop! The Dragon Allocates Pace!

Type33. - Advent! The Bride of the Prince!


Kamen Rider Gai appears with Faiz ,Kuuga Pegasus Form and OOO Tajadol Combo,according by Urataros Gai is consider the least compatible match.Type33. - Advent! The Bride of the Prince!

Video Game appearances

Kamen Rider Ryuki (Video Game)


Gai as seen in the Videogame

Kamen Rider Gai appears as playable character in the PS1 game, like that the others Ryuki Riders also he summons his Contract mosnter Metalgeas and using is Advent cards and his finisher Heavy Pressure.

Kamen Rider Riderbout


Gai as seen in Kamen Rider Riderbout

Kamen Rider Gai appears as a playable character with the other Heisei and Showa kamen Riders in Kamen Rider Riderbout.

Kamen Rider Break Joker

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Kamen Rider Gai Break Joker card

Kamen Rider Gai appears as a playable character with other Riders and monsters in Kamen Rider Break Joker.

Kamen Rider Batton-Line


Gai in Batton-Line

Kamen Rider Gai appears as a playable character in Kamen Rider Batton-Line among other Riders in the game.

Other Game appearances

Battle Spirits


Kamen Rider Gai Battle Spirits card

Kamen Rider Gai appears with other Kamen Riders and Monsters in Battle Spirits.


Jun is a self-centered and arrogant man who takes pleasure in flaunting his superiority and toying with other people's lives for nothing more than a good laugh. He has no qualms about taking others' lives or leading others to do so. He prides himself in his resourcefulness and intelligence, which allows him to be able to manipulate other people the way he sees fit. However, such a trait eventually becomes the reason for his death, as he arrogantly (and wrongly) thinks that his intelligence will enable him to control Takeshi Asakura - one of the most dangerous participants of the Rider War, only to be manipulated himself in the end.

Kamen Rider Gai

Kamen Rider Gai

Kamen Rider Gai

Rider Statistics

  • Rider Height: 195 cm.[1]
  • Rider Weight: 100 kg.[1]

Rider Senses:

  • Eyesight: 8 km.[1]
  • Hearing: 10 km.[1]

Ability Parameters:

  • Punching Power: 15 t.[note 1]
  • Kicking Power: 15 t.[note 1]
  • Maximum Jump Height: 20 m.[1]
  • Maximum Running Speed: 100 m. per 5 sec.[1][2]

Special Attacks:

Jun can transform into Kamen Rider Gai using his Advent Deck and V Buckle upon forming a contract with Metalgelas. His Visor, the Metalvisor (メタルバイザー Metaru Baizā), is mounted on his left shoulder. Gai's punching power and kicking power are identical to Zolda's, while his jump height and running speed are higher. However, his jump height is still overall poor in comparison to the rest of the 13 Riders.

Through the use of his Strike Vent Advent Card, Gai can arm himself with the Metal Horn (メタルホーン Metaru Hōn), a gauntlet derived from Metalgelas' head.

By using his Final Vent, Gai can execute his finisher, Heavy Pressure (ヘビープレッシャー Hebī Puresshā), which equips him with the Metal Horn if he does not already possess it. Gai next grabs onto Metalgelas' head with his legs and points the Metal Horn in front of him. Metalgelas then runs into the enemy, resulting in Gai striking it with the Metal Horn.

Appearances: Ryuki Episodes 15-19, 28,All Riders vs. Dai-Shocker, Let's Go Kamen Riders.

Contract Monster

Main article: Metalgelas


  • Advent Deck - Transformation device and Advent Card holder
  • V Buckle - Transformation belt
  • Advent Cards - Trinkets that enable a Rider to summon Contract Monsters, access equipment, and use special abilities
  • Metalvisor - Gai's Visor that enables him to use Advent Cards


  • Rideshooter - Motorcycle used by any Rider to enter the Mirror World

Rider Cards

Kamen Ride Gai

Kamen Ride: Gai

Behind the scenes


Jun Shibaura is portrayed by Satoshi Ichijo (一條 俊 Ichijō Satoshi). As Kamen Rider Gai, his suit actor was Takeshi Mizutani (水谷 健 Mizutani Takeshi).


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Kamen Rider Gai concept art


  • Since his last appearance in Rider Gathering, several fans began to depict Kamen Rider Gai as a human shield (as he was used as one by Ouja to defend Zolda's Final Vent), earning the "Guard Vent" nickname.


  • His Rider name, Gai, is a kun'yomi reading for the kanji "Yoroi" ( lit. "armor"), as his Rider form appeared as he is heavily armored along with his Mirror Monster, Metalgelas.
  • Like other Riders, Jun died an ironic death: He loved to manipulate other people but was killed by a person he thought he could manipulate, technically having himself manipulated in the end.
  • Gai is one of three riders in the series who has their Visor attached to their suit (in Gai's case, the Visor is mounted on his shoulder), the other two being Imperer whose Visor is mounted on his knee, and Verde whose Visor is mounted on his thigh. The same is said for their respective American counterparts.




  1. 1.0 1.1 300 AP[1], conversion: 1 AP (Ryuki) = 20 t.
  2. 2000 AP[1], conversion: 1 AP (Ryuki) = 20 t.
  3. 5000 AP[1], conversion: 1 AP (Ryuki) = 20 t.
  4. 4000 AP[3], conversion: 1 AP (Ryuki) = 20 t.

External Links

See also

Icon-ryuuki Kamen Rider Ryuki
The 13 Kamen Riders
Shinji Kido - Ren Akiyama - Masashi Sudo - Shuichi Kitaoka - Miyuki Tezuka - Jun Shibaura - Takeshi Asakura - Satoru Tojo - Mitsuru Sano - Kamen Rider Odin - Goro Yura
Movie Exclusive: Itsuro Takamizawa - Miho Kirishima - Dark Shinji
The Alternatives
Hajime Nakamura - Hideyuki Kagawa
Kanzaki family
Yui Kanzaki - Shiro Kanzaki - Sanako Kanzaki
ORE Journal
Daisuke Okubo - Reiko Momoi - Nanako Shimada - Megumi Asano
Mirror Monsters
The Contract Monsters: Dragreder - Darkwing - Volcancer - Magnugiga - Evildiver - Metalgelas - Venosnaker - Genocider - Destwilder - Gigazelle - Goldphoenix - Biogreeza - Blancwing - Dragblacker - Psycorogue
Wild Mirror Monsters: Spiders (Dispider - Mispider - Respider - Solospider) - Zelles (Gigazelle - Megazelle - Magazelle - Negazelle - Omegazelle) - Zebraskulls (Iron - Bronze) - Boarders (Wildboarder - Shieldboarder) - Biters (Zenobiter - Terabiter) - Krakens (Bakraken - Wiskraken) - Gulds (GuldThunder - GuldStorm - GuldMirage) - Abyss (Abysshammer - Abysslasher - Abyssodon) - Buzzstingers (Hornet - Bee - Wasp - Frost - Broom) - Sheerghosts (Sheerghost - Raydragoon - Hydragoon) - Deadlemur - Gelnewt - Sonorabuma - Brobajell - Fake Kamen Rider Agito
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