Home world: Earth (Daicon Return Of Ultraman)
First appearance: Return of Ultraman (1983)
Latest appearance: None
Height: TBA
Weight: TBA
Category: Kaiju
Affiliation: None
Roar(s): TBA

Kiruan (キルアン, Kiruan) is a kaiju that appeared in the Daicon film, Return of Ultraman.

Subtitle: Growth Jewel Bug Monster (増殖怪獣バグジュエル, Zōshoku Kaijū Bagujueru)


  • Height: Unknown
  • Weight: Unknown
  • Origin: Tokyo's Sewer System


Return Of Ultraman

Kiruan was formerly a normal insect that had somehow ended up in Tokyo's sewage system. A meteor from space crashed near it's location, and the rock unleashed mysterious gases. The gas caused Kiruan to grow so large that it's head broke through the streets into aerial view. An attack team who had come to investigate the meteor attempted to subdue the creature, but they no match for it. The monster used it's prehensile tail to knock down one ship and pull another underground as it fled. Later the next day, Kiruan reappeared fully grown and much more powerful than before. The attack team attempted to fight it off again, but were still outmatched. When one of them was about to suicide and sacrifice themselves to kill Kiruan with a bomb, he was stopped. The ship had been grabbed by Ultraman to stop the man from destroying himself. Ultraman put the ship down and went to fight Kiruan. The monster proved extremely tough, summoning a shield to block all of the ultra's deadliest attacks. Eventually Ultraman figured out how to break through it, throwing the bomb from earlier to destroy the shield. He then fired his finishing Specium Beam causing Kiruan to finally be destroyed. Ultraman then went back to normal undercover with that attack team.


  • Kiruan is the first known fan created kaiju to be created and even given a suit.
  • Kiruan is one of the few kaiju to attempt eating an ultra as shown when he opens his mouth around Ultraman's head. The only other ones are Kyasshi, Gan-Q, and Bogal.

Powers and Weapons

  • Prehensile Tail: Kiruan has an easily maneuverable tail, being able to grab objects.
  • Shield Summon: Kiruan can summon both a square shaped shield and encase himself in one to block both physical and energy attacks.
  • Explosive Bullets: Kiruan can fire speedy explosive projectiles at targets.