Character from One-Punch Man by ONE & Yusuke Murata
S-Class Rank 4 — the world's greatest swordsman, whose Atomic Slash cuts so fast it reduces targets to atoms, and whose pride won't let him acknowledge anyone who isn't strong enough to shake his hand.
Atomic Samurai's Atomic Slash is one of the most powerful conventional attacks in the series — a slash so fast it appears as a single cut but is actually hundreds, reducing targets to particles. He refused to shake Saitama's hand because Saitama didn't 'feel' strong, which is both an excellent character moment and proof that Atomic Samurai's threat assessment needs calibration. He takes three disciples (Iaian, Okamaitachi, Bushidrill) and the samurai way seriously. His weakness is opponents who can regenerate faster than he can cut, which is a recurring problem.
Lean and severe with long dark hair and traditional samurai attire. He carries a katana and chews on a blade of grass perpetually. He looks like a ronin from a samurai film and behaves like one.
Also known as: Atomic Samurai, Kamikaze