Seasons & episodes
S0 · E1Road to Hero 2015-12-04 · 24 min
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.
S0 · E2The Shadow That Snuck Up Too Close 2015-12-24 · 12 min
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.
S0 · E3The Student Who Sucks at Storytelling 2016-01-29 · 12 min
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…
S0 · E4The Ninja Who Is Too Complicated 2016-02-24 · 12 min
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…
S0 · E5Bang, Who Is Too Overbearing 2016-03-25 · 12 min
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.
S0 · E6The Sisters Who Have Too Many Things Happening 2016-04-22 · 12 min
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.
S0 · E7The Murder Case That Is Too Impossible 2016-05-27 · 12 min
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.
S0 · E8A Super Serious Look Back! 2019-04-03 · 24 min
One Punch Man 2nd Season’s commemorative recap special.
S0 · E9Saitama and Those with Reasonable Abilities 2019-10-25 · 12 min
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.
S0 · E10Old Dudes and Fishing 2019-11-26 · 12 min
Atomic Samurai and Bang go out fishing to a lake.
S0 · E11Genos and Memory Loss 2019-11-29 · 12 min
As Genos and Saitama watch TV, Saitama accidentally knocks Genos out trying to reach his potato chips and Genos wakes up with memory loss.
S0 · E12Games and Rivals 2020-01-28 · 12 min
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.
S0 · E13Puri Puri Prisoner and the Escaped Prisoners 2020-01-29 · 12 min
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.
S0 · E14The Zombieman Murder Case 2: A Chalet Amid the Blizzard, and the Ones Bothered by the Cold 2020-01-31 · 12 min
Child Emperor, Zombieman, Superalloy Darkshine, and Metal Bat are dispatched to a forlorn, snowy mountain to hunt down a monster.
S0 · E15Broadcast Commemorative Episode: A Serious Look Back at the Anime One-Punch Man Season 2 2025-10-05 · 24 min
One Punch Man 2nd Season’s commemorative recap special.
S1 · E1The Strongest Man 2015-10-05 · 24 min
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.
S1 · E2The Lone Cyborg 2015-10-12 · 24 min
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.
S1 · E3The Obsessive Scientist 2015-10-19 · 24 min
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.
S1 · E4The Modern Ninja 2015-10-26 · 24 min
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.
S1 · E5The Ultimate Master 2015-11-02 · 24 min
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.
S1 · E6The Terrifying City 2015-11-09 · 24 min
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.
S1 · E7The Ultimate Disciple 2015-11-16 · 24 min
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.
S1 · E8The Deep Sea King 2015-11-23 · 24 min
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.
S1 · E9Unyielding Justice 2015-11-30 · 24 min
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?