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Yadokarin (ヤドカリン) was a Kaiju from the TV series, Return of Ultraman, it first appeared in episode 29.

Subtitle: Hermit Crab Monster (やどかり怪獣 Ya Dokari Kaijū)


Return of Ultraman

When Space Station #5 crashed to Earth, a hermit crab-like Kaiju made it its home. Hollowing out most of the ship, the beast remained out of sight until a young boy, Jiroh, found the fallen station and entered through the hatch. Disturbed by this, Yadokarin began to move about with MAT trying to rescue the boy trapped inside. Hideki Go summoned Ultraman Jack to save his young friend.

He managed to get the creature to leave the shell, but the Kaiju lashed out with its poison spray and pointed claws. The Kaiju tried to retreat back to its home, but Jack impaled it with his Ultra Bracelet and then fired his Spacium Beam. While Jiroh was rescued, the strange monster was burned to death.


  • Yadokarin was inspired by a hermit crab.
  • Yadokarin’s roar was created by modifying the roar of the Kaiju Gabara from the Godzilla franchise by lowering the pitch.
  • Designer: Maiya Kei Akira
  • Suit actor: Toya Takanobu
    • According to the suit actor that played Yadokarin, kneeling was a hard positon to keep.
  • Yadokarin is one of the monsters that makes up Belyudra's right arm in Mega Monster Battle: Ultra Galaxy Legends The Movie.
  • This episode was featured in episode 151 of New Ultraman Retsuden, "Fight Ultra Warriors! Dissecting the Circle of Justice!."


  • Height: 52 m
  • Weight: 50,000 t
  • Origin: Space
Powers and Weapons
  • Poison Spray: Yadokarin can fire a greyish-white chemical solution from his claws, stated to be a poison of some description. The actual effect of this poison is unknown, though it appeared to inflict pain on contact with Jack's head.
  • Space Station Shell: Like a hermit crab, Yadokarin can turn specific objects into a protective home. He made a shell out of the Space Station #5, giving him a protective dome that he can hid within, emerge from, and move around in.



Return of Ultraman

Return of Ultraman Kaiju
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