The Badan Empire was originally thought to be a secret organization aiming to conquer the world, creating a Third Empire. Badan claims to inherit the will of all the previous organizations that attempted to conquer the world but were defeated by the Kamen Riders, including the alien group, Jin Dogma.
However, the Kamen Riders eventually united and stopped the organization's plans. Afterwards, they changed their mode of operation and started acting in even more secrecy in the shadows of the world. They became known as Underground Empire Badan, operating from their main base, Badan City, presumed to be hidden somewhere in Earth's underground. In Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai, Badan's true nature is revealed to be different from what was previously thought. Rather than inheriting the will to build a third empire, Badan is actually the Kingdom of the Dead, and its true goal is to bring all the dead souls back to the living world, and carry out the grudge of the previous organizations against the Kamen Riders.
Publication Information
- Organization : Badan Empire
- Japanese : バダン帝国
- Season : Birth of the 10th! Kamen Riders All Together!!
- Led by : The Generalissimo of Badan
- Generals and other Notable Members : Ambassador Darkness
- Monster Types : Roids
- Grunts / Footsoldiers : Combat Roids
- Battled :
Badan was a secret organization spread in various points of the world, planning to bring about a Third Empire. It was apparently led by Ambassador Darkness, a relative of Shocker's Ambassador Hell. Thanks to its advanced technology, some reports of its activities around the world were seen as UFO activity.
Ryo Murasame, a college student, and his sister, Shizuka Murasame, traveled to Brazil to investigate reports about UFO activities in the Amazon rain forest. Soon, they were attacked by the UFO they were searching for, and captured by Badan's troops. Shizuka soon was killed, while Ryou underwent an alteration procedure that remodeled his entire body, only leaving his brain intact, to become the perfect cyborg, ZX. Ryou became a pilot for Badan, but, after an accident, recovered his memories, turning against them. Badan attempted to kill him, but were defeated, losing their Amazonian base during his escape. The Nine first Kamen Riders fought against Badan, but they were unable to find out where their hideout was.
OOO, Den-O, All Riders : Let's Go Kamen Riders
In an alternate timeline caused by Ankh leaving an O-Medal behind in the year 1971, Shocker conquered Japan with the Shocker Greeed. The Badan Empire itself never came to exist as an independent organization, but its cyborg Tiger-Roid was a Shocker member in this alternate timeline.
Kamen Rider × Super Sentai : Super Hero Taisen
Underground Empire Badan
Ressha Sentai ToQger Vs Kamen Rider Gaim Spring Vacation Combining Special
Years after their defeat against the 10 Riders, Badan continues to operate from a supposedly underground base, Badan City. In spite of their efforts, the Riders are unable to locate it. Ambassador Darkness reappears as one of Badan's commanders. In this period, the organization became known as Underground Empire Badan.
Heisei Rider vs. Showa Rider : Kamen Rider Taisen feat. Super Sentai
Shu Aoi, Ren's late son is targeted by Badan Soldiers in the land of dead until Kouta Kazuraba and Mai Takatsukasa, whom happened to be investigating rumors about a portal to another world inside Earth, save him and bring him up to the surface. Takeshi Hongo also appears in their way. Badan soon launches an invasion force to the surface. Due to this, Tsukasa, Kaito and Kouta resort to gather the 15 main Heisei Riders as soon as possible.
Membership
Leader:
- The Generalissimo of Badan : The giant skull which appeared after Ambassador Darkness's death. It disappeared sneering at the ten Riders. Dr. Kaidō said that it was the energy of an evil spirit.
- Ambassador Darkness : He is the nominal leader of the Badan Empire and the brother of Ambassador Hell of the Shocker organization.
- Eisuke Mikage / Tiger-Roid : He is a cyborg able to produce a wide variety of artillery from his body and has attributes abilities equal with Ryō.
- Yamaarashi Roid : A porcupine monster. In the original magazine stories, which existed before the tv special, he was the leader of Badan's Inhumanoid troops, but the tv special doesn't portray him as a commander.
Badan's Inhumanoids:
- Dokuga Roid : A moth monster.
- Jigoku Roid : A antlion monster.
- Tokage Roid : A lizard monster.
- Kamaki Roid : A mantis monster.
- Amenba Roid : A Gerridae water strider monster.
- Taka Roid : A hawk monster.
- Bara Roid : A rose monster.
- Chameleo Roid : A chameleon monster.
- Kumo Roid : A spider monster.
- Mogura Roid : A mole monster; appears in Ressha Sentai ToQger vs. Kamen Rider Gaim
Revived Inhumanoids:
- Kamisori Hitode from Destron : A starfish monster with a sword blade for a left hand
- Jūjin Ōmukade from Geddon : A centipede monster.
- Gamereojin from Neo-Shocker : A chameleon monster.
- Kamakirigan from Dogma Kingdom : A mantis monster.
- Chameleking from Dogma Kingdom : A chameleon monster.
- Combat Roids : Badan Empire's cyborg foot soldiers

Underground Empire Badan
Membership
Leader: High Ranking Commanders:
- Ambassador Darkness
- Kamen Rider Fifteen
- Tiger Roid
- Yamaarashi Roid
- Mogura Roid:
- Delza Army
- General Shadow
- Gorgom
- Baraom
- Crisis Empire
- General Jark
- Super Evolved Lifeforms Mutamits
- Evil Army Shadow Line
- General Schwarz
Other members:
- Shocker Inhumanoids
- Scorpion Man
- Saboteguron
- Ghoster
- Zanjioh
- Shiomaneking
- Poison Lizard Man
- Jaguarman
- Girizames
- Geldam/Gel-Shocker Kaijin
- Hiruchameleon
- Ganikomol
- Destron Inhumanoids
- Turtle Bazooka
- Geddon
- Cyborg Majin
- Marshal Machine
- Gorgom
- Bilgenia
- Neo Organism
- Fog
- Garai
- Orphnoch
- Demon Robot
- Schwarian
- Dopant
- Bird Dopant
- Yummy
- Kamakiri Yummy
- Ika-Jaguar Yummy
- Greeed
- Super Evolved Lifeforms Mutamits
- Zodiarts
- Phantoms
- Arachne
- Gremlin
- Shocker Combatmen
- Destron Combatman
- Combat-Roids
- Chaps