One-Punch Man
All it takes is one punch.
Storyline
Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he’s become so strong that he’s practically invincible. In fact, he’s too strong—even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?
Episodes
Specials
No overview available for this season.
Road to Hero
Dec 04, 2015
A story about Saitama from when he still had hair and his only costume was a track suit. Several shops in Saitama’s neighbourhood have gone out of business and the owner of the last one left needs his help.
The Shadow That Snuck Up Too Close
Dec 24, 2015
A story set sometime between Mosquito Girl’s defeat and Genos showing up to Saitama’s apartment. Genos wants to learn the secret to Saitama’s power and decides to follow him and to observe everything he does. At the same time, Saitama is convinced that someone is stalking him.
The Student Who Sucks at Storytelling
Jan 29, 2016
Jenosu it accidentally trapped in Don Pacino a little bit caught in the Mafia of conflict. Jenosu that are in a hurry the shopping asked the bargain in Saitama’s to explain to Don Pacino, but…
The Ninja Who Is Too Complicated
Feb 24, 2016
Sonic strive to strict training muffled to the mountain, but had spent the days of troubled with nightmares to be a nasty blow to the groin from Saitama who suffered a defeat. Man of Matagi had seen such a situation. He is also “formidable enemy” in defeated in the past of the owner…
Bang, Who Is Too Overbearing
Mar 25, 2016
After the events of episode 7, Bang begins to spy on Saitama and Genos to gauge their abilities. Hopeful that his Water Stream Rock Smashing Fist martial arts is stronger, and that proving so will coerce Saitama and Genos to study under him, Bang invites Saitama and Genos to his dojo under the pretense of giving them free meat.
The Sisters Who Have Too Many Things Happening
Apr 22, 2016
During a coincidental train ride, Genos and Fubuki are put to the test when an anti-Hero Association group plants a bomb on the train.
The Murder Case That Is Too Impossible
May 27, 2016
Child Emperor investigates the murder of Zombieman. When Saitama is put under suspicion, Genos promises that he will vouch for Saitama even if he’s the culprit.
A Super Serious Look Back!
Apr 03, 2019
One Punch Man 2nd Season’s commemorative recap special.
Saitama and Those with Reasonable Abilities
Oct 25, 2019
Saitama meets a group of villains in a public restroom who mistake him for their ally, they introduce themselves to Saitama, but when he reveals he’s a hero, attempt to defeat him.
Old Dudes and Fishing
Nov 26, 2019
Atomic Samurai and Bang go out fishing to a lake.
Genos and Memory Loss
Nov 29, 2019
As Genos and Saitama watch TV, Saitama accidentally knocks Genos out trying to reach his potato chips and Genos wakes up with memory loss.
Games and Rivals
Jan 28, 2020
Saitama brings Genos to a tournament for the fighting video game “Wild Animals” due to the grand prize being five million yen. Several locations all over the country are being used as venues, and the battles take place online.
Puri Puri Prisoner and the Escaped Prisoners
Jan 29, 2020
One stormy night, a monster emerges from a junkyard and begins making its way towards Smelly Lid Prison. Noticing its approach, Puri-Puri Prisoner breaks out of his cell and quickly defeats the monster. However, he damages the prison’s electricity in the process, allowing a handful of inmates to escape.
The Zombieman Murder Case 2: A Chalet Amid the Blizzard, and the Ones Bothered by the Cold
Jan 31, 2020
Child Emperor, Zombieman, Superalloy Darkshine, and Metal Bat are dispatched to a forlorn, snowy mountain to hunt down a monster.
Broadcast Commemorative Episode: A Serious Look Back at the Anime One-Punch Man Season 2
Oct 05, 2025
One Punch Man 2nd Season’s commemorative recap special.
Season 1
Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he’s become so strong that he’s practically invincible. In fact, he’s too strong—even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?
The Strongest Man
Oct 05, 2015
Saitama is a guy who’s a hero for fun. After saving a child from certain death, he decided to become a hero and trained hard for three years. Though he’s now so strong he can defeat any opponent with a single punch, lately he feels as if, in exchange for overwhelming power, he’s lost something even more important.
The Lone Cyborg
Oct 12, 2015
A monster is moving toward City Z, one that has been created by the mysterious organization known as The House of Evolution. Genos, a young cyborg, attempts to stop it, but gets in over his head before Saitama happens along.
The Obsessive Scientist
Oct 19, 2015
Saitama and Genos glean information about The House of Evolution and its founder Dr. Genus, a scientist with dangerous ideas on artificial human evolution. Meanwhile, Dr. Genus learns of Saitama’s amazing strength and has plans of his own for One-Punch Man.
The Modern Ninja
Oct 26, 2015
A group of battlesuit-clad terrorists called “The Paradisers” appears in City F, led by an enormous man known as Hammerhead. Calling for the redistribution of wealth, the group targets the fat-cat Zeniru, who in turn dispatches his bodyguard to defeat them. Unfortunately, Saitama is on the same errand.
The Ultimate Master
Nov 02, 2015
Though he’s been doing the hero gig for three years, Saitama realizes that the public knows nothing about him. Determined to get a little recognition, he decides to become a pro hero, but first he must pass the Hero Association tests and become a full-fledged member.
The Terrifying City
Nov 09, 2015
It’s been five days since Saitama became a professional hero and he has yet to do anything heroic. When Genos informs him that C-class heroes who don’t fight bad guys are dropped from the hero registry after a week of inaction, Saitama heads out on patrol, yet can’t find any criminals or monsters to stop.
The Ultimate Disciple
Nov 16, 2015
An enormous meteor hurtles toward City Z, forcing the Hero Association to ask its S Class heroes to respond. When all their efforts prove in vain, Genos decides it’s up to him to protect the home of his master and stop the meteor, no matter what the cost.
The Deep Sea King
Nov 23, 2015
A pack of monsters calling themselves the “Clan of the Seafolk” arrive on the shores of City J intent on invading the land. When the hero sent to fight them is defeated easily by the Deep Sea King himself, Saitama and Genos head for the city to help.
Unyielding Justice
Nov 30, 2015
As the battle with the Deep Sea King reaches its climax, more heroes fall to the aquatic despot’s brutal attacks. Which of them has what it takes to be a true hero?
Unparalleled Peril
Dec 07, 2015
Saitama tags along to an emergency meeting of Class S heroes and discovers that a seer has foretold a serious danger threatening the Earth. Though the crisis could occur anytime in the next six months, the heroes are surprised to hear the roar of explosions that very hour!
The Dominator of the Universe
Dec 14, 2015
As a colossal spaceship floats in the skies above City A, a member of its monstrous crew battles on the ground against a group of S Class heroes. Despite their powers, they can’t seem to finish it off. Meanwhile, Saitama has boarded the enemy ship on his own.
The Strongest Hero
Dec 21, 2015
The inconceivably powerful Lord Boros has traveled untold distances in search of someone who can cure his boredom: Saitama! With the fate of humanity in the balance, will the two champions at last find in each other the worthy opponent they’ve been searching for?
Season 2
Saitama, alongside his cyborg disciple Genos, is ready to begin his official duties as a professional hero. But when a new friendship and interest in martial arts prove distracting, the Hero Association is left to deal with a sinister new wave of monster attacks on their own. To make matters worse, their heroes are being hunted! Is Earth doomed, or will Saitama save the day with one punch?
Return of the Hero
Apr 10, 2019
Saitama is out shopping with Genos in tow when the pair come across G4, a demonic robot on a mission to eliminate King. Elsewhere, Sitch attempts to recruit various cutthroats, villains and assassins of the underworld to help the Hero Association.
Human Monster
Apr 17, 2019
Garou issues a declaration of war on the Hero Association through terrifying means, Hellish Blizzard gives Saitama an ultimatum, and Genos decides to eliminate his master's stalker, Speed-o'-Sound Sonic.
The Hunt Begins
Apr 24, 2019
Garou, out hunting heroes, can barely contain his excitement when he gets the chance to battle the S Class hero Tank-top Master. Meanwhile, Silverfang shutters his dojo to begin his own hunt of his former disciple.
Metal Bat
May 01, 2019
Assigned to guard a VIP and his son, Metal Bat couldn't be less thrilled. But when the group is suddenly attacked all hell breaks loose. Meanwhile, Saitama has disguised himself as Charanko in order to enter the “Super Fight” martial arts tournament.
Martial Arts Tournament
May 08, 2019
Monsters from the Monster Association launch simultaneous attacks on all the human cities, attempting to overwhelm the forces of the Hero Association. Meanwhile, the “Super Fight” martial arts tournament kicks off.
The Uprising of the Monsters
May 15, 2019
The Super Fight tournament kicks off while Genos takes on multiple monsters who have appeared in City C. Elsewhere, countless monsters are wreaking havoc in multiple areas, but the Hero Association is being overwhelmed by the sheer number of threats.
Class S Heroes
May 22, 2019
As the Super Fight tournament heads for its grand finale, the Class S heroes battle to hold back the tide of monster incursions. Meanwhile, Atomic Samurai is setting in motion a plan of his own.
The Strong Ones Fight Back
May 29, 2019
Goketsu, the first Super Fight Tournament champion, arrives in the stadium. Having now become a monster, he’s aiming to force the Super Fight competitors to turn into monsters themselves. When several do, it’s up to Suiryu to take them on alone.
The Ultimate Dilemma
Jun 12, 2019
Just as Suiryu finds himself in the depths of despair, Saitama suddenly appears to help him out. But despite all Saitama’s strength, there’s still something bugging the hero that he just can’t seem to shake.
The Encircling Net of Justice
Jun 19, 2019
The Monster Association issues a challenge to the Hero Association, telling them they have only three days to rescue the hostage Waganma. Elsewhere, Garou tries to recover from his constant fighting, but things don’t quite go as planned.
Everyone's Dignity
Jun 26, 2019
Garou is at last surrounded by multiple heroes and forced to fight, even though he’s covered in wounds and nearly at his limit. The hero hunter still has his incredible ability to read opponents’ fighting styles, but there are surprises in store for all.
Cleaning Up the Disciple's Mess
Jul 03, 2019
Silverfang and Bomb catch up with Garou while the hero hunter is battling Genos, starting a whirlwind battle that draws in more and more combatants as it marches towards its hair-raising climax!
Season 3
Alongside Genos, his faithful disciple, Saitama performs his official hero duties as a member of the Hero Association. One day, monsters claiming to be from the Monster Association suddenly appeared, taking a child of the Hero Association executive hostage. The S-class heroes gather and plan a raid on the Monster Association hideout to rescue the hostage. Meanwhile, Garou, a “human monster” who was taken by the Monster Association during a battle with the heroes, awakens in the Monster Association hideout.
Strategy Meeting
Oct 12, 2025
The heroes plan a rescue of a child kidnapped by monsters, while Garou awakens deep underground.
Monster Traits
Oct 19, 2025
On his way to hunt heroes, Garou dines and dashes at a restaurant, but is chased by Saitama.
Organism Limits
Oct 26, 2025
Garou fights Insect God and King the Ripper, while Tareo gets kidnapped. Dr. Kuseno visits Saitama.
Counterattack Signal
Nov 02, 2025
The heroes prepare for battle without Silverfang and Genos. Garou attacks the Monster Association.
Monster King
Nov 09, 2025
Garou rescues Tareo but is struck by Overgrown Pochi, falling to Orochi and Gyoro-Gyoro.
Motley Heroes
Nov 16, 2025
Class-S heroes plan the Monster Association assault, but Amai Mask arrives and clashes with them.
Counterstrike
Nov 23, 2025
Heroes arrive in Z City but face a monster ambush. A-class aids while Gyoro-Gyoro watches the fight.
Ninja Tale
Nov 30, 2025
Tempest Wind and Hellfire Flame, who were ninjas but are now monsters, battle with Flashy Flash.
Brave Child
Dec 07, 2025
Child Emperor finds Waganma and faces Phoenix Man, using his ultimate weapon to protect him.
Immortal Bloodbath
Dec 14, 2025
Zombieman faces Vampire, a descendant of a supernatural bloodline, in a brutal, deadly showdown.
Top Dragons
Dec 21, 2025
Child Emperor rescues Waganma. The heroes take on threat-level Dragon monsters in a deadly fight.
Ultimate Lifeform
Dec 28, 2025
The heroes battle monsters while Terrible Tornado faces Gyoro-Gyoro. Orochi appears before Saitama.
Series Info
Status
Returning Series
Seasons
3
Episodes
36
Language
ja
Networks
