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Sword Devil Executioner (剣鬼ブッタギリ, Kenki Buttagiri, VIZ: The Chopper-Upper) was a Mysterious Being and a member of the Monster Association. He was killed by Atomic Samurai.[1]


Sword Devil Executioner had a short stringy beard and long hair, giving him an aged look. He had eight eyes, wore a set of spiky armor, and wielded a sword with a similar aesthetic.


Sword Devil Executioner was an arrogant monster, believing himself to be an equal to Atomic Samurai. He was also very dedicated to his swordsmanship, determined to be the greatest swordsman in the world.


Human Monster Saga[]

Monster Association Arc[]

Atomic Samurai slices Sword Devil Executioner into pieces.

Atomic Samurai slices several monsters in half. However, Sword Devil Executioner manages to block the blow.[2] The hero is surprised by this, and Sword Devil Executioner goes on to explain his determination to kill Atomic Samurai, as defeating the hero would help him on the path to being known as the world's strongest. The monster then launches several swings, which Kamikaze effortlessly parries. Sword Devil Executioner boastfully claims that they are equals, but he is quickly proven wrong as Atomic Samurai had already sliced him into several pieces, killing the monster.

Abilities and Powers[]

Though his disaster level is unknown, Sword Devil Executioner displayed a reasonable amount of skill and power. He was rather proficient with his swordsmanship, being the only one of several monsters who was able to avoid Atomic Samurai's Flash Attack.[3]

Physical Abilities[]

Sword Devil Executionar trades blows with a casual Atomic Samurai

Enhanced Speed: Sword Devil Executioner was able to react fast enough to avoid death by Atomic Samurai's Flash Attack. He was also able to trade blows with the hero for a short while, albeit ineffectively.[4]

Fighting Style[]

Expert Swordsman: Sword Devil Executioner dedicated his life to the sword, though he was no match for Atomic Samurai.


Sword: Sword Devil Executioner carried a sword on him and was proficient in using it.


Original design

  • His name is a pun on the Japanese words:
    • 剣鬼 (Kenki), which means "devilish swordsman".
    • 打った切る (Buttagiru), which means "to chop up".
  • His design was changed when the chapter was redrawn.


  1. One-Punch Man Manga; Chapter 110
  2. One-Punch Man Manga; Chapter 110, page 7
  3. One-Punch Man Manga; Chapter 110
  4. One-Punch Man Manga; Chapter 110


Monster Association
Executives Black Sperm *Evil Natural Water *Homeless Emperor Fuhrer Ugly Gums Overgrown RoverNyan Elder Centipede Gouketsu 
Demon Awakened Cockroach Baquma Bug God Building Booper Devil Long Hair Do-S *Eyesight G5 Hundred-Eyes Octopus Vampire (Pureblood) Rafflesidon Royal Ripper Face Ripper Fist Fight Djinn Free Hugger Rhino Wrestler The Three Crows Senior Centipede Showerhead Super Mouse Unihorn The Great Food Tub 
Unknown Gyoffrey Goddess Glasses Venus Mantrap Junior Centipede Haragiri Rosie Choze Benpatsu *Hamukichi *Volten *Evil Eye Gale Hellfire Evil Eggs ManakoPlatinum Sperm Sword Devil Executioner Raptora *Reptera
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 Bruinado Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Eyesight Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Macho Daikon Mosquito Girl Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse Surprise-Attack Plum 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 Angry Grandpa Autumn Phantom Red Golden-ringed Dragonfly *Benpatsu *Choze DarkDark Matter Gunner Eagle Enamel Evil Eggs Evil Eye Evil Natural Water *Falcon Fish of DarknessGale Giant Salamander Gigakigan Goddess Glasses Gyoffrey Hamukichi *Haragiri Hawk Hellfire Junior Centipede Kite Lord Great White ManakoMen's Esthetician Man *Platinum Sperm Rosie Raptora *RepteraSage Centipede Suppon Sword Devil Executioner Venus Mantrap Volten *