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Icon-ryuki.png This article is about a Mirror Monster in Kamen Rider Ryuki.

Volcancer (ボルキャンサー, Borukyansā) is a Mirror Monster that is contracted to Kamen Rider Scissors: Masashi Sudo in Kamen Rider Ryuki.

Volcancer was the first example of the consequences that a Rider will face if they breach their contract with a Mirror Monster.


Volcancer appears as Scissors' Contract monster and resembles a humanoid crab. His hands are giant pincers which are occassionally used by Scissors for attacks.


Kamen Rider Ryuki

Volcancer first appeared to be attacking a woman. Shinji, who mistakenly took it for an uncontracted monster fought it before running into his contractor, Kamen Rider Scissors.

After that, when Masashi's Deck was destroyed by Ren in the Mirror World during a battle. Volcancer attacked, crushed and ate Masashi as the destruction of his deck and cards had also resulted in a breach of his contract with the monster. Volcancer, now uncontracted to a rider, attacked Ren and was initially winning until Shinji appeared. Volcancer was eventually destroyed by Ryuki's Dragon Rider Kick and its essence absorbed by Darkwing when Ryuki told Dragredder not to absorb it.

Kamen Rider Decade

In the World of Ryuki, Volcancer assists Scissors as Contract Monster in the Kamen Rider Trial. During the Rider Battle, Scissors tricked Verde after the latter was gaining the upper hand, saying that he lost. After Verde let his guard down, Scissors summoned Volcancer to attack Verde, removing from him the trial at the same time. [Battle Trial: Ryuki World]

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

As a Mirror Monster, Volcancer was one of the monsters seen fighting Ryuki during his segment of the All Rider battle.

Kamen Rider Zi-O

Volcancer was among one of many Mirror Monsters brought over to Sougo Tokiwa's world as the Rider Worlds began to merge. [2019: Vanishing Watches]

Video Game

Volcancer is one of four Contract Monsters who appear as a playable character in the Kamen Rider Ryuki video game.




  • Height: 224 cm
  • Weight: 165 kg
  • Scissors Attack: Scissors' Final Vent Volcancer launches Scissors into the air with its claws to perform a somersault spinning attack.
    • The Climax Heroes games give it the ability to breathe bubbles.


Through the use of certain Advent Cards, parts of Volcancer's body can be used by Scissors as weapons or other equipment.

  • Scissorspinch (シザースピンチ, Shizāsu Pinchi): An arm-mounted claw derived from Volcancer's left pincer. It is summoned with Scissors' Strike Vent card.
  • Shelldefense (シェルディフェンス, Sheru Difensu): A shield derived from the armor plating on Volcancer's back. It is summoned with Scissors' Guard Vent card.

Behind the Scenes

Concept Art

Volcancer concept art

Volcancer was designed by Tamotsu Shinohara (篠原 保, Shinohara Tamotsu).


  • Its name is a portmanteau of the two words, volcano and Cancer, used for both a genus of a crab and the Zodiac sign.


See also

Icon-ryuuki.png 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/Special Exclusive: Koichi Sakakibara - Itsuro Takamizawa - Miho Kirishima - Dark Shinji
Stageshow Exclusive: Kamen Rider Papillon - Kamen Rider Cerberus
The Alternatives
Hajime Nakamura - Hideyuki Kagawa
Transformation Devices
Card Decks - V Buckle - Advent Cards
Dragvisor - Darkvisor - Scissorsvisor - Magnuvisor - Evilvisor - Metalvisor - Venovisor - Destvisor - Gazellevisor - Biovisor - Blancvisor - Blackdragvisor - Goldvisor - Slashvisor - Abyssvisor
Sword Vents
Ridesaber - Dragsaber - Winglancer - Venosaber - Wingslasher - Goldsabers - Dragsaber (Ryuga) - Abysssaber - Slashdagger
Strike Vents
Dragclaw - Scissorspinch - Gigahorn - Metalhorn - Destclaws - Dragclaw (Ryuga) - Abyssclaw
Guard Vents
Dragshield - Wingwall - Shelldefense - Gigaarmor Wingshield - Dragshield (Ryuga) - Goldshield
Shoot Vents
Gigacannon - Gigalauncher
Swing Vents
Spin Vents
Hold Vents
Rideshooter - Dragranzer (Bike Mode) - Darkraider (Bike Mode) - Psycoroader
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 (Contract Monster) - Goldphoenix - Biogreeza - Blancwing - Dragblacker - Psyco-Rogue
Wild Mirror Monsters: Spiders (Dispider - Mispider - Respider - Solospider) - Zelles (Gigazelle - Megazelle - Magazelle - Negazelle - Omegazelle - Begazelle - Igazelle) - 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