Kaijin Creation Methods

A list of the various ways Kaijin were created in the show they’re in.

## Overview

In Tokusatsu, there’s usually methods where the main villains create their Kaijin through various ways. Some would perform surgical operations to create a Kaijin, some would use magic, some would use a special device, and some would use genetics.

Most of the time, though, the Kaijin would already be living beings that were born as monsters, which is the case for most Demon Kaijin, Alien Kaijin, and Yokai Kaijin.

## Created Kaijin

The list of methods on how Kaijin were created in various ways.

### Originated from Humans

Kaijin that were born from the human body that usually relates to their emotions

#### Phantoms

The Phantoms from Kamen Rider Wizard are monsters who were born from human hosts called Gates who gave into despair and unleashed their inner phantoms.

#### Yummy

The Yummy from Kamen Rider OOO are monsters who are born from humans filled with greed and desire when a Cell Medal is inserted into them.

#### Bugsters

The Bugsters from Kamen Rider Ex-Aid are monsters who are created from humans infected by the Bugster virus.

#### Deadmen

The Deadmen from Kamen Rider Revice are inner demons of humans who have been unleashed from their hosts when they press a Vistamp onto their bodies.

#### Minusaurs

The Minusaurs from Kishiryu Sentai Ryusoulger are monsters of negative energy that born from humans holding negative emotions over something when Cleon infects them with his own slime.

#### Dark Robots

The Dark Robots from Android Kikaider are robots built in the organization DARK.

#### Battle Machineman

The Battle Machineman from Jikuu Senshi Spielban

### Possession/Animated

Kaijin that were once inanimate objects or non-physical forces until they’re animated into monsters.

#### Zuno Beasts

The Zuno Beasts from Chouju Sentai Liveman

#### Jigen Beasts

The Jigen Beasts from Choujin Sentai Jetman where once inanimate objects until they’re parasitized by a Dimensional Bug that animates into monsters.

#### Trinoids

The Trinoids from Bakuryuu Sentai Abaranger

#### Metaroids

The Metaroids from Tokumei Sentai Go-Buster are robots who were once inanimate objects until they were infected by the Meta Virus that changes them into humanoid robots by Enter after installing a program as well.

#### Yokai

The Yokai from Shuriken Sentai Ninninger are hybrids of traditional Yokai and inanimate objects when a corrupted Sealing Shuriken flies around and strikes an object, animating it into a Yokai.

#### Melzard Kaijin

The Melzard Kaijin from B-Fighter Kabuto were once fossils until they’re swallowed up by Mother Melzard and are turned into eggs, which would then immediately turn into a monster based off the fossil.

#### Shinkaiju

The Shinkaiju from Houjin Yatsurugi Season 1 are hybrids of sea animals and inanimate objects that are born when a flask of colored liquid is poured all over an object.

### Monster-Making Machine

#### Egos Kaijin

The Egos Kaijin from Battle Fever J are monsters who are created through a living capsule that can turn whatever is inside of it into Kaijin when Satan Egos gives it energy.

#### Vader Monsters

The Vader Monsters from Denshi Sentai Denjiman are monsters who are hatched from eggs when they’re placed in an incubator that accelerates their growth.

#### Dora Monsters

The Dora Monsters from Kyoryu Sentai Zyuranger were once clay figures sculpted by Pleprechaun and are placed inside the Nendora Machine that processes them and shoots them out of a tube, turning the clay figures into monsters.

#### Banki Beasts

The Banki Beasts from Engine Sentai Go-Onger are robotic beasts who are materialized through a machine that gives off Bikkurium energy.

### Genetics

#### Synthetic Beasts

The Synthetic Beast from Dai Sentai Goggle

#### Shinka Beasts

The Shinka Beasts from Kagaku Sentai Dynaman

#### Beast Warriors

The Beast Warriors from Choushinsei Flashman are mutants who are created when earth genes are combined with alien genes

#### Power Beasts

The Power Beasts from Armor Hero are monsters who are born from a combination of magic spirit stones and contaminated animal or plant genes.

## Transformed Kaijin

A list of methods where living beings are transformed into the Kaijin.

### Surgical Operations

#### Shocker Kaijin

The Shocker Kaijin from Kamen Rider would be humans who have either been kidnapped or volunteered for Shocker to operate on to turn into Cyborgs.

#### Destron Kaijin

The Destron Kaijin from Kamen Rider V3 would be humans who have been operated on to turn into monsters.

#### Mutant Robots

The Mutant Robots from Inazuman would be people with psionic abilities that the Neo-Human Empire would operate by replacing their body parts.

#### Despar Kaijin

The Despar Kaijin from Inazuman Flash were once human beings until the Despar Army modified them into cyborgs with entirely mechanical appearances.

### Mutation

Kaijin that were once weaker life-forms until they’re changed into stronger monsters.

#### Doruge Majin

The Doruge Majin from Choujin Barom-1 are humans that Doruge has chosen to become his agents and he infects them with his cancer cells, turning them into animal-themed monsters.

#### Satan Empire Kaijin

The Satan Empire Kaijin from The Kagestar would be humans that Doctor Satan kidnapped and mutated them through different means to turn them into loyal monsters.

#### Mutian

The Mutians from Shichisei Tōshin Guyferd are humans with special combat skills that got infected by the Fallah parasite, turning them into monsters that can turn their energy into physical energy.

#### Smash

The Smash from Kamen Rider Build are humans who have been gassed by a special substance called Nebula Gas by Faust, which turns them into mindless monsters.

#### Horrors

The Horrors from Garo are demonic creatures who taken possession of humans or inanimate objects, allowing them to transform into more powerful forms.

#### Cyber-Fairies

The Cyber-Fairies from Akiballion: Battlemaids of Akihabara were once humans until they’re turned into monsters by the main villain.

#### Hitotsuki

The Hitotsuki from Avataro Sentai Donbrothers are human beings who turned into Oni when a Noto member placed a virtual door on a human being’s forehead. Once it opens up, it turns the human being into a Hitotsuki based on their desires.

### Special Item

Kaijin that were lower forms until they were turned into monsters by a special item that also gives them their powers.

#### Dopant

The Dopants from Kamen Rider W are humans who bought a device called a Gaia Memory that allows them to transform into a superhuman monster once they activate it and install it into their bodies.

#### Zodiarts

The Zodiarts from Kamen Rider Fourze are humans who had their hands on an Astroswitch that when once pressed, gives them monstrous bodies that can survive in space.

#### Another Riders

The Another Riders from Kamen Rider Zi-O are humans who were given Another Watches by Time Jackers from different points of time, allowing them to turn into monstrous versions of past Kamen Riders.

#### Magia

The Magia from Kamen Rider Zero-One were once AI robots until they got hacked with a Zetsumeriser and are given a Zetsumerise Key that allows them to transform into monstrous, killing machines.

#### Raiders

The Raiders from Kamen Rider Zero-One are human beings who obtained a Progrise Key and Raidriser Belt, allowing them to gain mechanical suits.

#### Worlds

The Worlds from Kikai Sentai Zenkaiger were once foot soldiers called Kudakks until they were installed with a Tojiru Gear that holds a trapped world inside. Once installed, the Kudakk will temporarily turn into a senior combatant, Kudaiter, and then will be given a new head and, most of the times, a new pair of arms based on the trapped world.

## Living Kaijin

A list of methods on how Kaijin who were already born as monsters would appear.

### Summoned

Kaijin that would hang around until one of their superiors calls for them.

#### Captain Kaijin

The Captain Kaijin from Akumaizer 3 are demonic cyborgs which have been chosen by Mezalord to perform a operation for the Akuma Clan.

#### Space Beast Warriors

The Space Beast Warriors from Dengeki Sentai Changeman are aliens who are summoned from their home planets to create chaos on earth.

#### Universal Insect Monsters

The Universal Insect Monster from Tensou Sentai Goseigers are alien beings who are either summoned from their planets or are kept on the Warstar ship.

#### Majin

The Majin from Seijuu Sentai Gingaman are space pirates who would hang around the Daitanix until one of the captains of their group calls for them for assistance.

### Unsealed/Unleashed

#### Dogglers

The Dogglers from Hikari Sentai Maskman are subterranean creatures kept frozen in a room until one or two of them are chosen and are thawed out.

#### Boma Beasts

The Boma Beasts from Kousoku Sentai Turboranger are ancient monsters kept sealed and chained up in various places until their seal gets destroyed, whether by a member of the Boma Tribe or accidentally by humanity, and they’re set free.

#### Yokai

The Yokai from Ninja Sentai Kakuranger are mythical creatures that were sealed behind a door until they’re unleashed.

#### Saima Beasts

The Saima Beasts from Kyukyu Sentai GoGoV are demonic monsters of negative energy who are summoned from cards when united with negative energy upon a spell casted by Pierre.

#### Nether Demons

The Nether Demons from Armor Hero XT are beings from a different planet who were sealed in statues.

#### Megiddo

The Megiddo from Kamen Rider Saber are monsters who are kept sealed in Alter Ride Books until they’re unleashed when the Alter Ride Book is opened.

### Awakened

#### Gurongi

The Gurongi from Kamen Rider Kuuga are an ancient race who have been awaken from their slumber.