The BEST episodes of One-Punch Man

Every episode of One-Punch Man ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of One-Punch Man!

Saitama is a superhero who has trained so hard that his hair has fallen out, and who can overcome any enemy with one punch. However, because he is so strong, he has become bored and frustrated that he wins all of his battles too easily.

Last Updated: 12/14/2025Network: TV TokyoStatus: Continuing
The Strongest Hero
star
8.78
1500 votes

#1 - The Strongest Hero

Season 1 - Episode 12 - Aired 12/20/2015

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?

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The Dominator of the Universe
star
8.41
1383 votes

#2 - The Dominator of the Universe

Season 1 - Episode 11 - Aired 12/13/2015

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.

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Unyielding Justice
star
8.26
1365 votes

#3 - Unyielding Justice

Season 1 - Episode 9 - Aired 11/29/2015

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?

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Cleaning Up the Disciple's Mess
star
8.22
932 votes

#4 - Cleaning Up the Disciple's Mess

Season 2 - Episode 12 - Aired 7/3/2019

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!

Watch Now:Amazon
The Obsessive Scientist
star
8.13
1523 votes

#5 - The Obsessive Scientist

Season 1 - Episode 3 - Aired 10/18/2015

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.

Watch Now:AmazonApple TV
Class S Heroes
star
8.13
951 votes

#6 - Class S Heroes

Season 2 - Episode 7 - Aired 5/22/2019

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.

Watch Now:Amazon
The Hunt Begins
star
8.11
1001 votes

#7 - The Hunt Begins

Season 2 - Episode 3 - Aired 4/24/2019

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.

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Unparalleled Peril
star
8.11
1363 votes

#8 - Unparalleled Peril

Season 1 - Episode 10 - Aired 12/6/2015

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!

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Everyone's Dignity
star
8.06
898 votes

#9 - Everyone's Dignity

Season 2 - Episode 11 - Aired 6/26/2019

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.

Watch Now:Amazon
The Lone Cyborg
star
8.04
1638 votes

#10 - The Lone Cyborg

Season 1 - Episode 2 - Aired 10/11/2015

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.

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The Ultimate Disciple
star
8.01
1367 votes

#11 - The Ultimate Disciple

Season 1 - Episode 7 - Aired 11/15/2015

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.

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The Ultimate Master
star
7.99
1457 votes

#12 - The Ultimate Master

Season 1 - Episode 5 - Aired 11/1/2015

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.

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Human Monster
star
7.97
982 votes

#13 - Human Monster

Season 2 - Episode 2 - Aired 4/17/2019

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.

Watch Now:Amazon
The Modern Ninja
star
7.95
1499 votes

#14 - The Modern Ninja

Season 1 - Episode 4 - Aired 10/26/2015

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.

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The Deep Sea King
star
7.95
1374 votes

#15 - The Deep Sea King

Season 1 - Episode 8 - Aired 11/22/2015

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.

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The Strong Ones Fight Back
star
7.92
943 votes

#16 - The Strong Ones Fight Back

Season 2 - Episode 8 - Aired 5/29/2019

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.

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The Strongest Man
star
7.83
1989 votes

#17 - The Strongest Man

Season 1 - Episode 1 - Aired 10/4/2015

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.

Directors: Shingo Natsume
Watch Now:Amazon
The Terrifying City
star
7.80
1398 votes

#18 - The Terrifying City

Season 1 - Episode 6 - Aired 11/8/2015

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.

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Return of the Hero
star
7.71
1141 votes

#19 - Return of the Hero

Season 2 - Episode 1 - Aired 4/10/2019

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.

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The Ultimate Dilemma
star
7.69
934 votes

#20 - The Ultimate Dilemma

Season 2 - Episode 9 - Aired 6/12/2019

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.

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The Uprising of the Monsters
star
7.63
931 votes

#21 - The Uprising of the Monsters

Season 2 - Episode 6 - Aired 5/15/2019

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.

Watch Now:Amazon
Metal Bat
star
7.60
950 votes

#22 - Metal Bat

Season 2 - Episode 4 - Aired 5/1/2019

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.

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The Encircling Net of Justice
star
7.57
899 votes

#23 - The Encircling Net of Justice

Season 2 - Episode 10 - Aired 6/19/2019

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.

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Martial Arts Tournament
star
7.43
933 votes

#24 - Martial Arts Tournament

Season 2 - Episode 5 - Aired 5/8/2019

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.

Watch Now:Amazon
Ninja Tale
star
6.61
181 votes

#25 - Ninja Tale

Season 3 - Episode 8 - Aired 11/30/2025

Tempest Wind and Hellfire Flame, who were ninjas but are now monsters, battle with Flashy Flash.

Watch Now:Amazon