One-Punch Man Wiki
One-Punch Man Wiki
I am the Ultimate Life-form Gigakigan!

Gigakigan (ギガキガン, Gigakigan) was a Mysterious Being who was a rock with his own will. He was killed by Tatsumaki.[1]


Gigakigan had a humanoid appearance, his entire body was made of rocks. Two horns could be seen protruding from either side of his head.


Gigakigan considered himself the ultimate life form. He held a grudge against humans for wiping away his comrades "the minerals" through mining. As such, eradicating humanity became his goal.


He had been enveloped in magma and collected energy for over a thousand years before awakening. During those thousand years, he witnessed his fellow brethren be mined away by humans.

Appearances in Other Media[]


Tatsumaki's Day Off[]

He awakens in an unknown city and prepared to wreck havoc, but is quickly defeated by Tatsumaki.

Abilities and Powers[]

Although Gigakigan's disaster level is unknown, he had been shown to possess enormous physical strength and durability.

Physical Abilities[]

Gigakigan pushing a cliff-side apart

Immense Strength: Gigakigan was large and possessed monstrous strength, able to effortlessly push a cliff-side apart.

Immense Durability: Gigakigan withstood years of magma and smoldering.


  • His name is a portmanteau of Giga/ギガ (Giga) and Kigan/奇岩 (strangely shaped rocks).
  • At over a thousand years old, Gigakigan is one of the oldest characters in the series.



Mysterious Beings
Dragon (or higher) Boros Orochi *
Demon 170,000-Year-Old Cicada Larva 170,000-Year-Old Cicada Adult Armored GorillaAwakened Cockroach Baquma Beast King Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Mosquito Girl *Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse The Great Food Tub The Three Crows Unihorn Vampire (Pureblood) 
Wolf Himawari Hotdog Messenger of the Seafolk Piggy Bancon Tongue Stretcher
Less than Wolf
Unknown Alien Seer *Ancient King Autumn Phantom Red Golden-ringed Dragonfly *Benpatsu *Choze Dark Matter Gunner Eagle Enamel Evil Eggs Evil Eye Eyesight Falcon Fish of DarknessGale Gigakigan Goddess Glasses Golden SpermGyoffrey Hamukichi *Haragiri Hawk Hellfire Junior Centipede *Kite ManakoRosie Raptora *RepteraSuppon Sword Devil Executioner Venus Mantrap Volten *