Monsters are the main antagonists in every incarnation of Kamen Rider, and sometimes the source of their powers. Whether they are controlled by evil organizations, attack humans to feed off them or become more powerful or are malicious creatures that wish to take over the world, they oppose the Kamen Riders. Oftentimes using the powers of the very monsters they fight against, Riders battle these monsters to protect the people.
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Terminology
Kaijū (怪獣 kaijū) is a Japanese word that literally translates to "strange creature," and is used to refer to a genre of tokusatsu entertainment. Kaiju films usually showcase monsters of any form, usually attacking a major Japanese city or engaging another (or multiple) monster(s) in battle.
Related terms include kaijū eiga (怪獣映画 kaijū eiga, monster movie), a film featuring giant monsters or a single monster; kaijin (怪人 referring to roughly humanoid monsters); and daikaiju (大怪獣 daikaijū, giant kaiju), specifically meaning the larger variety of monsters.
By Series
Showa Era
- Kamen Rider - Shocker Kaijin, Gel Shocker Kaijin
- Kamen Rider V3 - Destron Kaijin
- Kamen Rider X - Shinwakaijin & Akuninkaijin (followers of G.O.D.)
- Kamen Rider Amazon - Beastmen (followers of Geddon or Garanda Empire)
- Kamen Rider Stronger - Kikkaijin (followers of Black Satan), Majin (members of the Delza Army)
- Kamen Rider (Skyrider) - Neo-Shocker Kaijin
- Kamen Rider Super-1 Dogma Kaijin (followers of Dogma Kingdom then Jin Dogma)
- Birth of the 10th! Kamen Riders All Together!! - Roids (followers of the Badan Empire)
- Kamen Rider Black - Gorgom Kaijin
- Kamen Rider Black RX Crisis Empire Kaijin
- Shin Kamen Rider: Prologue - Cyborg Soldiers (Created by the Institute of Super Science, following the Foundation)
Heisei Era
- Kamen Rider Kuuga - Gurongi
- Kamen Rider Agito - Lords
- Kamen Rider Ryuki - Mirror Monsters (Contract Monsters)
- Kamen Rider 555 - Orphnoch
- Kamen Rider Blade - Undead
- Kamen Rider Hibiki - Makamou
- Kamen Rider Kabuto - Worms
- Kamen Rider Den-O - Imagin (Gigandeath)
- Kamen Rider Kiva - Fangire (Six Pillars Sabbath), Arms Monsters, Legendorga
- Kamen Rider W - Dopants
- Kamen Rider OOO - Greeed, Yummies
- Kamen Rider Fourze - Zodiarts (Horoscopes)
- Kamen Rider Wizard - Phantoms
- Kamen Rider Gaim - Inves
- Kamen Rider Drive - Roidmudes
- Kamen Rider Ghost - Gamma, Gammaizers
- Kamen Rider Ex-Aid - Bugsters
- Kamen Rider Build - Smash, Blood Tribe
- Kamen Rider Zi-O - Another Riders
- Kamen Rider Amazons - Amazons
Reiwa Rider
Adaptations
Other
All items (1519)
- A (EXE)
- Abunger
- Abyss
- Abyss Hammer
- Abyss Lasher
- Abysshammer
- Abysslasher
- Abyssodon
- Acarina Worm
- Advanced Inves
- Ageha Yummy
- Ahiru Megid
- Akane Egusa
- Albinoleo Imagin
- Alcohol Dopant
- Alseides
- Altar Zodiarts
- Amaganser
- Amazonha
-
- Amenba-Roid
- Amikiri
- Ammonite Mutant
- Ammonite Orphnoch
- Anemonaguar
- Anemone
- Anemone Mutant
- Anguis Femineus
- Anguis Masculus
- Ankylosaurus Yummy
- Anomalocaris Dopant
- Another Ghost (third)
-
- Another Zero-One
- Ant Beastman
- Ant Capone
- Ant Mutants
- Antchimedes
- Antegabari
- Anthopper Imagin
- Anthopper Imagin Ari
- Anthopper Imagin Kirigiris
- Antlion Fangire
- Antlithunder
- Antront
- Aokabijin
- Aoki
- Aonuma
- Apis Mellitus
- Apis Vespa
- Aquarius Zodiarts
- Aquila Zodiarts
- Arachne
- Aracnea Worm Flavus
- Aracnea Worm Nigritia
- Aracnea Worm Rubor
- Aranbura Bugster
- Argo Zodiarts
- Argus
- Ari Megid
- Aries Zodiarts
- ArigiThunder
- Arijigokujin
- Arimammoth
- Ark Magia (Arsino Type)
- Ark Magia (Berotha Type)
- Ark Magia (Dodo Type)
- Ark Magia (Ekal Type)
- Ark Magia (Kuehne Type)
-
- Ark Magia (Neohi Type) (Second)
- Ark Magia (Onycho Type) (Second)
- Armadig
- Armadillo Imagin
- Armadillo Mutant
- Armadillo Undead
- Armadillong
- Armored Division
- Armored Knight
- Arms Dopant
- Asuma
- Atchpetchy
- Aurora Dopant
- Aya Kujo
- Ayakashi
- Aye-aye Mutant
- Ayumi Kita
- Baboon Man
- Baboon Mutant
- Bachingaru
- Badan Greeed
- Bahamut
- Bakegani
- Bakekarasu
- Bakeneko
- Bakraken (Dragon Knight)
- Bakraken (Ryuki)
- Bakuronger
- Balunbolun
- Bamboo Orphnoch
- Bananatex
- Bandersnatch
- Bang-Gong
- Bara-Roid
- Barnacle Orphnoch
- Baron Rock
- Bat Amazon 1
- Bat Amazon 2
- Bat Amazon 3
- Bat Amazon 4
- Bat Dopant
- Bat Imagin
- Bat Kikkaijin
- Bat Man
- Bat Mutant
- Bat Orphnoch
- Bat Type Roidmude
- Bat Undead
- Batta Yummy
- Be-Jimin-Ba
- Bearconger
- Bearded Dragon Man
- Beast Chimera
- Beast Dopant
-
- Bee Beastman
- Bee Mutant
- Bee Undead
- Bee Woman
- Beelzebub
- Beetle Undead
- Beetletron
- Begazelle
- Bellcricetus Worm
- Bengoshi Bingo
- Berotha Magia (Alternate Timeline)
- Bio Roid
- Biogreeza (Dragon Knight)
- Biogreeza (Ryuki)
- Bird Dopant
- Birdman Icarus
- Bison Yummy
- Biters
- Black Cat Beastman
- Black Cat Mutant
- Black Satan's Giant Monsters
- Blackwing
- Blancwing (Dragon Knight)
- Blancwing (Ryuki)
- Bloodsucker Imagin
- Blue Omu Yummy
- Blue-Fanged Louse
- Bluebird Imagin
- Boar Undead
- Boarbeeton
- Boarders
- Bogy
- Boketarou Tendon
- Bongo
- Book Gamma
- Boulder Beetle
- Brachiosaurus Dopant
- Brachypelma Worm Aurantium
- Brachypelma Worm Viridis
- Brain Mite
- Brobajell (Dragon Knight)
- Brobajell (Ryuki)
- Bruticon
- Buffalo Mutant
- Buffalo Undead
- Bugster Union
-
- Bujin
- Bull Man Minotaur
- Burgermon Bugster
- Buriburizaemon
- Burner Bat
- Burs
- Butterfly Amazon 1
- Butterfly Amazon 10
- Butterfly Amazon 2
- Butterfly Amazon 3
- Butterfly Amazon 4
- Butterfly Amazon 5
- Butterfly Amazon 6
- Butterfly Amazon 8
- Butterfly Amazon 9
- Butterfly Orphnoch
- Buzzstinger Bee (Dragon Knight)
- Buzzstinger Bee (Ryuki)
- Buzzstinger Bloom
- Buzzstinger Broom
- Buzzstinger Frost (Dragon Knight)
- Buzzstinger Frost (Ryuki)
- Buzzstinger Hornet (Dragon Knight)
- Buzzstinger Hornet (Ryuki)
- Buzzstinger Wasp (Dragon Knight)
- Buzzstinger Wasp (Ryuki)
- Buzzstingers