Items

Battle Suits are powered armor engineered by the Organization to lift a wearer's strength and toughness into superhuman territory. Multiple versions exist across the Paradisers, Narinki's mercenaries, and later the Neo Heroes, each with…

Biceps Brachii King is a synthetic steroid concocted by Fukegao. Flavored like strawberry for easy swallowing, it swells the user's muscles until their whole body balloons into a towering form, a change witnessed only in Marugori.

A gilded suit of armor that the alien warlord Boros straps on to cap his own overwhelming strength, letting him savor a battle instead of ending it instantly. Saitama shatters the plating during their duel, yet the ruined shell still…

A colossal piloted mech built by Child Emperor as his secret trump card, powerful enough to trade blows with a Dragon-level threat. Its catch is a brutal timer: the machine can only run for two minutes and thirty-eight seconds before its…

The unassuming black satchel that serves as Child Emperor's main combat tool. It looks like an ordinary school bag but unpacks an arsenal of drills, claws, burners, and spider-like limbs, hinting at some form of compression technology…

A surveillance satellite designed by Child Emperor to scout enemy forces from orbit. Ahead of the assault on the Monster Association, he used it to tally how many opponents the heroes would face, reading the base through heat rather than…

Nine mystical orbs forged to imprison the Cruel Dragon. Ancient warriors split the beast's essence among the stones and hid them in scattered shrines, leaving a knightly order to guard the seals against a cult determined to revive the…

A scouting robot deployed by Child Emperor and the Hero Association to map the path toward the Monster Association's lair. It crawled through the tunnels the Elder Centipede had bored underground until the enemy caught and silenced it.

A dating sim, localized as Heartthrob Sisters, that King guiltily picks up during a shopping trip. Set after the apocalypse, it casts the player and a lone sister as the last humans, surrounded by hundreds of robotic siblings built in her…

A prototype signaling device the Hero Association issues so heroes can call for reinforcements when a battle turns against them. Still in testing, it has already summoned aid in more than one desperate fight.

The glowing energy sphere at the center of Genos' chest, wired to his frame by a single cable. It is the cyborg's heart and power plant rolled into one, a compact nuclear reactor whose destruction or removal would kill him instantly.

The tooth-shaped mothership of the Dark Matter Thieves, a roaming fortress that ferried Boros across the stars to raid world after world. Its power core shattered during Saitama's duel with Boros, sending the vessel crashing to Earth.

A massive aircraft carrier designed by Bofoi, marked with hull number 52. Caught up in the rampage of Evil Natural Water off Z-City, it loses its aircraft to the sea and ends up commandeered by Saitama as a makeshift surfboard.

A public catalogue the Hero Association publishes to profile its ranks, listing each hero's name, rating, and signature moves. Its accuracy is spotty, since the strongest heroes guard their secrets while lesser ones overshare for fame.

The Hero Association Defence Units are a line of automated combat robots that Bofoi engineered to shield the organization's A-City headquarters. They activate on their own whenever a monster strays too close to the building, escalating…

The Hero Association Mug is a running background gag in the manga, a plain cup that keeps popping up in the hands of various heroes. The article about it is written as a lighthearted joke rather than a serious entry.

The Legendary Demon Blades are a matched pair of katana of equal power that once belonged to the Ninja Village Leader. This webcomic-only weapon set changed hands after Saitama stripped them from their original wielder.

The Locator is a combined tracking and communication gadget invented by Child Emperor. It equips the Hero Association strike team during the assault on the Monster Association's underground base, keeping members in contact and letting the…

This unbreakable metal bat is the signature weapon carried by the S-Class hero Metal Bat, forged by the Hero Association as a durable replacement for the ordinary bats he kept snapping in battle. It came to him as a reward for his…

Metal Bishop is a remotely piloted flying robot built and directed by Bofoi as one member of his elite Metal Series squad. Designed for aerial fights and produced in numbers, it debuts in the webcomic's Robot Invasion Arc.

Metal King is a sword-wielding humanoid robot piloted remotely by Bofoi as part of his Metal Series squad, appearing in the webcomic's Robot Invasion Arc. Marked by the three-lens head shared across Bofoi's machines, it fights with an…

The Metal Knight Unit is Bofoi's favorite and most-used war machine, a remotely piloted robot bristling with cannons. It represents the physical body Bofoi sends into the field under his Metal Knight hero identity.

Metal Pawn is a human-sized humanoid robot remotely piloted by Bofoi as part of his Metal Series squad. Its frame later inspired the design of The Robot Invaders. It debuts in the webcomic's Robot Invasion Arc.

Metal Queen is a missile-firing robot remotely operated by Bofoi as part of his Metal Series squad, its pineapple-like frame breaking from the humanoid mold in the webcomic's Robot Invasion Arc. Built for ranged bombardment and carrying…

Metal Rook is a cannon-armed humanoid robot piloted remotely by Bofoi as part of his Metal Series squad, its frame closely echoing the Metal Knight in the webcomic's Robot Invasion Arc. It opens fire through the large cannon fixed to its…

The Metal Series is an elite six-robot strike team assembled from Bofoi's best machines, built to wipe out threats quickly, and this webcomic-only squad first sees action during the Robot Invasion Arc. Its strength lies in tightly…

Mini Octotank No. 8 is a small octopus-shaped combat machine built by Child Emperor. It patrols a designated alert zone and automatically opens fire on anything that moves, standing guard over the young hero during the war on the Monster…

Moe Moe Chronicle 2 is a video game owned by King. The disc becomes the accidental centerpiece of one of the series' running jokes, since it is the very item King is chasing when the Hero Association mistakes him for the man who killed…

Monster Cells are heavily mutated cellular masses engineered by Orochi that rewrite a human who swallows one, dragging the body and mind past ordinary limits and remaking the person as a Mysterious Being. They power much of the Monster…

The Moon Blade is a fabled hidden sword whose whereabouts nobody knows. Legend holds that a warrior who carries it alongside the Sun Blade will command power beyond compare, a prize the Council of Swordmasters has chased for generations.

The Mysterious Cubes are cube-shaped relics that let a person speak with the entity known as God. Anyone who touches one hears its voice, may be offered power, and risks destruction if judged unworthy. Blast has spent years hunting them…

Okame-chan is a mask-shaped measuring tool built by Child Emperor that puts a number on how physically strong a body is. It reads muscle and nerve development against body weight, though it ignores supernatural gifts and breaks past a…

The Power Core was the energy heart of the Dark Matter Thieves' colossal spaceship. It kept the vessel aloft over A-City for as long as it stayed whole, and its shattering after Saitama beat Boros sent the mothership plunging to the ground.

Robots in One-Punch Man are machines that either think for themselves through artificial intelligence or take orders by remote. They arrive in every conceivable shape and serve every kind of role, from armed combat units to laborers and…

Saitama's hero suit is the yellow caped outfit that defines his look and earns him the nickname Caped Baldy. A tailor who once mended his old tracksuit made it for him, and though he was shy about it at first, it became one of his most…

The Sun Blade is a legendary sword forged ages ago on a now-sunken continent and handed down among a line of swordsmen. Nichirin passes it to Atomic Samurai during the Monster Association war, and legend pairs it with the Moon Blade for…

Super Brave Giant is Child Emperor's mountain-dwarfing super robot and his ultimate trump card in the webcomic. Built to crush threats like the Monster Association, its enormous bulk brings raw power but robs it of speed and leaves its…

The Tickle-Tickle Bug is a tiny yet lethal trick robot from Child Emperor's arsenal. Slipped under a target's clothing, it tickles them without pause until laughter and exhaustion push them into suffocation, a cruelty that made even its…

The Ultimate Premium Beef Gift Set is a package of rare, top-grade meat that Dr. Kuseno presents to Saitama as thanks for looking after Genos. Difficult to obtain, it later doubles as bait in the running joke of attempts to lure Saitama…

Underdog Man is a line of combat robots built by Child Emperor to back him up in the field. Styled after dogs, individual units can hold their own briefly, and three of them can lock together into a triple-headed brute known as Mad Dog…

The Virtual Genocide System is a training headset built by Dr. Kuseno for Genos. It reads the wearer's brainwaves to stage simulated fights against stored monster data, and can even spawn a ghost copy of the user to spar against for…