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This page is meant to catalog all major events in the One-Punch Man universe in chronological order.

For a timeline of Webcomic events, please refer to Timeline of Events (webcomic).

Before the series
Date Fights, Battles & Events Image
25 Years Prior Saitama is born.
20 Years Prior
Boros and the Dark Matter Thieves begin their journey to planet Earth after receiving a prophecy stating that they will find a worthy opponent for Boros there. Boros unleashed backstory.png
19 Years Prior Genos is born.
13 Years Prior
Saitama enters Middle School and is beaten by Piggy Bancon.
Mumen Rider attends the same school and is beaten by some delinquents.
Ropm tankobon 001 extra 017.jpg
11 Years Prior

10 Years Prior

At most 7 years ago
Gouketsu wins the first Super Fight tournament.

Zombieman escapes from the House of Evolution

Gouketsu fights Orochi and loses, then eats a monster cell.
Gouketsu Human.jpg
4 Years Prior
Genos' town and family are destroyed by a mad cyborg. Dr. Kuseno saves Genos, and transforms him into a cyborg.
3 Years Prior
Saitama saves a young child from Crablante which began his childhood goal of becoming a hero, and begins his training.
Sometime after the event, Agoni founded the Hero Association.
Saitama vs Crablante.png
2.5 Years Prior

2 Years Prior
The S-Class is created.

Elder Centipede is almost defeated by Blast.
Metal Bat defeats a monster as a C Class hero.png
Saitama's 300th day of training Saitama defeats Himawari, and later Personification Of A Light Pull Cord. Fopm tankobon 002 extra 014.jpg
More than 1.5 years prior Saitama defeats Octopus Claw Man and saves King. King saved by Saitama.jpg
More than 1.5 years prior Saitama's hair begins to fall out.
170,000-Year-Old Cicada Larva attacks Z-City, but is killed by Saitama.
More than 1 year prior Metal Bat is promoted to S-Class, and receives his signature metal bat. Metal Bat asking for a bat.jpg
Less than One Year Prior Garou beats up and incapacitates his fellow disciples and is promptly expelled from Bang's dojo. Garou rampage.png
Six Months Prior Garou steals the identity of Wolfman, and uses his identity to win the Super Fight Tournament.
His victory earns him the attention of Suiryu, a famous martial artist and previous 4-time winner of Super Fight.

Amai Mask tops the popularity ranking. Stinger joins the hero association.

Garou in his disguise during the fighting tournament..png
Less than One month Prior Homeless Emperor obtains his powers from God.
Unknown time ago Flashy Flash caused the 44th graduation class incident, and Speed-o'-Sound Sonic was the sole survivor.
Present series
Date Fights, Battles & Events Image
Present Saitama has now become a powerful hero for fun, capable of killing monsters in one punch. Saitama saves cities from Vaccine Man, Marugori, Super Custom YO649Z Mk. II and the Subterranean King.

B-City is destroyed.

Saitama kills Marugori Anime.png
Next Day Saitama meets Genos, saving him from Mosquito Girl.
Dr. Genus orders his minions to bring Saitama to the House of Evolution.
Saitama splashes Mosquito Girl.png
1 Week Later Genos begins his tutelage under Saitama's guide. Soon after, Saitama's apartment is attacked.
The duo infiltrate the House of Evolution's headquarters and combat Carnage Kabuto and destroy him. Dr. Genus' life is positively changed after Saitama's actions.
Saitama and Genos arrive at the House of Evolution.png
1 Day Later Hammerhead and the Paradise Group begin their attack, but are defeated by Speed-o'-Sound Sonic and Saitama.
Saitama meets Sonic and defeats him.
1 to 2 Days Later Saitama and Genos attend the Hero Association exam and pass. Genos becomes an S-Class hero, while Saitama becomes a C-Class hero.
Sneck attempts to fight Saitama but is defeated.
Genos and Saitama spar and Saitama is overwhelmingly victorious.
Genos attacks.png
7 Days Later Saitama encounters Speed-o'-Sound Sonic during his search for a criminal in order to accomplish his weekly hero quota. Saitama quickly dispatches him and is promoted to C-Class rank 342.
Golden Ball and Spring Mustache are sent to investigate Z-City's ghost town, where they encounter Kombu Infinity who defeats them.
Unknown A giant meteor heads towards Z-City. S-Class hero Metal Knight and Genos fail to stop it, but Saitama manages to shatter the meteor, though he is unable to prevent collateral damage to the city. SaitamavMeteor.png
3 Days Later Tanktop Tiger and Tanktop Black Hole accuse Saitama of taking credit for the S-Class heroes' role in destroying the meteor, and challenge him to a battle. Tanktop Black Hole calls out Saitama.png
Several days after Deep Sea King and his Seafolk begin their invasion of the surface world, starting with J-City, many heroes failed to defeat the Deep Sea King.
Stinger manages to defeat the Seafolk.
Sonic and S-Class hero Puri-Puri Prisoner escape prison, and encounter the Deep Sea King.
The Seafolk invading Earth.png
Hours Later The Deep Sea King finds the shelter and later fights Genos and defeats him.
Mumen Rider arrives to stop the Sea King, and gives a speech acknowledging his lack of power.
Saitama defeats the Sea King with ease and pretended to be a cheat in order to rally support for the defeat heroes, which worsened his reputation.
1 Day Later Saitama is promoted to Rank 1 in C-Class and then decides to move up to B-Class. He now has to start from the bottom of B-Class Rank 101. Promotioninterview.png
Unknown Shibabawa foresees a great tragedy that will result in the Earth's destruction. She develops a coughing fit and dies choking on a cough drop she swallowed.
Saitama is promoted to B-Class Rank 63.
Unknown All S-Class heroes are called to the Hero Association for an emergency meeting. All the S-Class heroes except Blast and Metal Knight show up to the meeting where it is revealed by Sitch that the earth is in great danger. S-Class Meeting.png
Boros and the Dark Matter Thieves arrive to A-City, destroying it.
Iaian loses his left arm against Melzargard.
Melzargard is killed by the combined efforts of Metal Bat, Puri-Puri Prisoner, Atomic Samurai, and Silver Fang.
Saitama confronts the leader of the Dark Matter Thieves, Lord Boros and they began to fight.
Boros uses "Collapsing Star Roaring Cannon" to destroy the planet, but Saitama counters the attack killing Boros.
1 Day Later Tanktop Master trains to prove his strength can compete with Tornado of Terror's psychic powers. After being humiliated by Metal Knight, Tanktop Master trains to surpass Metal Knight's machinery as well as Tatsumaki's psychic powers. TanktopMastertraining.jpg
1 Week Later Metal Knight rebuilds A-City and turns it into an unbreakable fortress.
The monster Pluton attacks Y-City and Z-City, but is destroyed by Saitama.
New Hero Association Headquarters Anime.png
Unknown G4 attacks King, but King runs away and Genos fights in his place. King is revealed to be a fraud and inadvertently took credit for defeating 5 monsters that Saitama defeated. King confesses.jpg
Unknown Sitch holds a meeting in an attempt to recruit criminals to help deal with the monster uprisings. Garou attends this meeting, defeats three heroes and all of the criminals there declares his hero hunt.
Blizzard of Hell tries to convince Saitama into joining the Blizzard Group, but fails.
Speed-o'-Sound Sonic fights Genos to a draw.
Garou defeats Mumen Rider, the Tank Topper Army, Charanko, Golden Ball and Spring Mustache on his hero hunt.

Saitama beats MA and E.jpg

Unknown Saitama decides to join the Super Fight Tournament under Charanko's name.
Garou attacks Saitama, who he believes to be a hero searching for him and is defeated.
Saitama chops Garou in the shoulder.png
1 Day Later Metal Bat is assigned to protect Narinki and his son Waganma from Garou. He confronts 4 Demon level threats and defeats them. Human Bird Grass Defeated.png
Hours Later Elder Centipede attacks S-City and Metal Bat attempts to stop him, but ends up fighting Garou. Meanwhile the Monster Association begin their invasion.
Metal Knight arrives in

an attempt to defeat Elder Centipede but fails. The monsters kidnap Waganma.

Garou Metal Bat.png
Hours Later The Super Fight tournament begins, with Saitama being in the semi-finals along with Volten, Choze and Suiryu. Genos eliminated all the monsters in C-City, but was defeated by Gouketsu. SFtop4.jpg
Hours Later Do-S encounters Blizzard of Hell and the Blizzard Group
Do-s' uses Fubuki to draw out Tornado of Terror.
BG under influence.jpg
Hours Later Child Emperor and Pig God fight Eyesight.
Drive Knight goes around killing monsters and interrogates one for info about the monster invasion.
Garou fights Watchdog Man.
Pig God vores Eyesight.png
Hours Later Flashy Flash fights Hundred-Eyes Octopus, but Tornado of Terror intervened and killed it.
Atomic Samurai and His Disciples decide to strike the Monster Association.
Saitama came into the finals of the Super Fight, where his disguise was blown and is disqualified. Suiryu wins by default.
Gouketsu traps all the Martial Artist and holds the Super Fight Stadium hostage.

Rosie, Choze, Benpatsu, Hamukichi and Volten become monsters.

Rosie is killed by Choze.

Suiryu vs. Monsters.jpg
Minutes Later Suiryu defeats Choze, Benpatsu, Hamukichi and Volten.

Gouketsu smashes Suiryu into the ground.

The Three Crows are killed by Sneck, Suiryu and Lightning Max.

Bakuzan is transformed into a monster and pummels Suiryu.

Nyan transforms several prisoners into monsters.

Puri-Puri Prisoner crushes Free Hugger.

Saitama kills Bakuzan and Gouketsu.

Watchdog Man defeats Garou.

Garou attempts to fight King but is defeated by Saitama.

Armored Gorilla defeats Marshall Gorilla and Zombieman follows Armored Gorilla.

Monster Bakuzan Icon.jpg

Puri-Puri Prisoner after defeating Free Hugger.png

Watchdog Man overwhelms Garou.png

Hours Later Drive Knight enters Z-city and loses contact with Hero Association staff.

Atomic Samurai and His Disciples search and destroy monsters while looking for the Monster Association's hideout.

Atomic Samurai and his Disciples2.png
Unknown Sonic receives an invitation for the Monster Association from Hellfire Flame and Gale Wind. Sonic eats a Monster Cell but fails to transform. Cooked Monster Cells.png
1 Day Later Death Gatling leads an ambush with Stinger, Smile Man, Chain'n'toad, Wild Horn, Glasses, Shooter and Gun Gun against Garou.

Garou defeats Death Gatling's ambush but is then intercepted by Genos. Monsters are sent to rescue Garou but Bang and Bomb arrive to reinforce Genos.

Meanwhile Saitama and King are playing video games until the distress signal from Glasses causes them to move out. Phoenix Man swoops in to save Garou while Elder Centipede causes a diversion.

Genos confronts Elder Centipede and ultimately loses.

King draws away Elder Centipede and Saitama kills Elder Centipede.

Whirlwind Iron Cutting Fist.png

Whirlwind Water Stream Roaring Aura Sky Ripping Fist 1.png Serious Punch.png

Hours Later

Hero Association staff has a meeting discussing Monster outbreak and Garou.

Zombieman discovers the location of Dr. Genus' new hideout

Child Emperor investigates the location of the Monster Association hideout. Metal Knight warns Child Emperor not to trust others.

Saitama, Genos, Bang and Bomb rest in Saitama's apartment. Saitama leaves to hunt Garou and buy cabbage.

Narinki sends his private squad to save his son.

Narinki's Private Squad.png
Hours Later G5 captures Narinki's Private Squad and tells Gyoro Gyoro that he was sent by The Organization.

Garou is assigned the task of killing a hero within a day to prove his allegiance to the Monster Association.

Monster ruling parade occurs. Garou dine and dashes.

Garou saves Tareo from bullying and gets knocked out by Saitama. Garou battles Royal Ripper and Bug God.

Zombieman confronts Dr. Genus about the disbanding of the House of Evolution and discovers the limiter theory.

Garou loses due to Sludge Jellyfish taking Tareo hostage.

Tareo is kidnapped by the monsters.


Sludge Capture.png

Hours Later Royal Ripper and Bug God report to Gyoro Gyoro on Garou.

G5 recovers Metal Knight's head.

Tareo is imprisoned with Waganma

Tareo and Waganma.png
Hours Later

Garou awakens and heads back for the Monster Association Headquarters.

Bang and Genos are removed from operation of saving Waganma.

Saitama, Genos, Bang, Bomb, Fubuki, King and Dr. Kuseno have hotpot.

Next Day Garou infiltrates the Monster Association and kills any scouting monster.

King awakens at Saitama's house and heads home. Outside his home, he is escorted by Hero Association staff to the HQ.

Puri-Puri Prisoner, Pig God, Superalloy Darkshine, Flashy Flash, Tornado of Terror, Atomic Samurai, Child Emperor, Zombieman and Sekingar plan their attack on Monster Association.

Garou saves Tareo and kills Royal Ripper.

Garou infiltrate.png

Garou using Whirlwind Iron Cutting Fist to slice Royal Ripper into pieces.png

Minutes Later Garou and Tareo encounter and escape Overgrown Rover. Garou battles Showerhead, Unihorn and Super Mouse. All three monsters are killed when they anger Overgrown Rover.

Garou battles Overgrown Rover and is sent to the bottom floor where Gyoro Gyoro resides.

Gyoro Gyoro explains her experiments into Mysterious Beings. Garou battles Orochi and is completely overwhelmed.

Saitama finds a manhole leading to the Monster Association's base.

Garou vs Overgrown Rover.png
Hours Later Sweet Mask masks interrupts the S-Class meeting and antagonizes Flashy Flash, Tornado of Terror and Zombieman. King arrives to the meeting.

Various other heroes are flown to the Hero Association HQ. King informs Bang and Bomb about the situation.

Fubuki, Genos, King, Bang and Bomb meet at Saitama's Apartment.

Genos stays to wait for Saitama. The rest heads towards the Monster Association's base.

Saitama is exploring the tunnels of the Monster Association's base.

Rescue Operation Heroes.png

Saitama in tunnels.png

Minutes Later The heroes strike team arrive at the Ghost town of Z-City to confront the Monster Association. They battle and kill various monsters including Evil Eye and Rhino Wrestler.

After watching the battle, Gyoro Gyoro calls a meeting with the Monster Association's cadres.

Rhino Wrestler overwhelming heroes.PNG
Minutes Later Sweet Mask, the S-Class heroes and Kamikaze's disciples all head into different entrances of the Monster Association's headquarters.

Flashy Flash runs into Gale Wind and Hellfire Flame. They battle with Flashy Flash emerging victorious. Flashy Flash loses his Locator during the fight.

Flashy Flash blocking Gale Wind and Hellfire Flame's attacks.png
Minutes Later Child Emperor discovers the remains of Bofoi's Metal Knight Unit and finds Waganma's location.

Child Emperor saves Waganma, killing several monsters such as Sludge Jellyfish and Phoenix Man.

Child Emperor and Waganma run into G5 but safely retreat from him.

Child Emperor confronts the resurrected Phoenix Man. Child Emperor summons his ultimate weapon, Brave Giant. During their battle Hellfire Flame and Gale Wind are revived and escape.

Saitama runs across Hellfire Flame and Gale Wind. Saitama dodges their attacks and the ninjas swear to one day kill him. They leave to confront Flashy Flash.

Phoenix Man is defeated.

Zombieman kills various monsters. Zombieman encounters and defeats Pureblood in 30 minutes.

Okamaitachi, Iaian and Bushidrill encounter Do-S and the mind controlled Narinki's Private Squad. They battle and Sweet Mask interrupts the fight letting the swordsmen go. But the three of them soon return and save the mercenaries from being murdered by Sweet Mask. Do-S is defeated by Sweet Mask shortly after.

Pig God encounters and kills The Great Food Tub. Atomic Samurai's disciples comes across their battle and leave to find another route.

Okamaitachi, Iaian and Bushidrill encounter Devil Long Hair and battle.

Metal Knight remains.jpg

Brave Giant New Design.png

Pureblood descends.png

Sweet Mask crushes Do-S.png

Devil Long Hair full view.png

Minutes Later

Puri-Puri Prisoner encounters various monsters including Maiko Plasma, Electric Catfish Man, Baquma, the monsterfied Smelly lid Prisoners and Nyan. Most monsters except Nyan and one of the monsterfied prisoners are dead.

Nyan leaves Puri-Puri Prisoner alone for other monsters to deal with.

Bug God battles Superalloy Darkshine and the monster is killed.

Overgrown Rover attacks Saitama. Saitama punches it, shaking the entire Monster Association Headquarters. Nyan attacks Saitama but escapes in fear.

Gyoro Gyoro encounters Tatsumaki and they battle resulting with Gyoro Gyoro's body ripped apart.

Orochi encounters Saitama. They battle and Saitama punches Orochi to pieces. Overgrown Rover runs away during their battle.

Gyoro Gyoro sends a spy drone and spots Saitama. Bang, Bomb and Fubuki, who had separated from King, converse about Tatsumaki's battle. King defeats a monster posing as Waganma.

Iaian, Bushidrill and Okamaitachi defeat Devil Long Hair.

Kamikaze defeats various monsters including Sword Devil Executioner and G5. G5's core manages to escape.

Black Sperm is chasing Tareo before being intercepted by Kamikaze. Kamikaze is beaten by Black Sperm but Kamikaze brings the ceiling down on them.

Child Emperor delivers Waganma to the surface team. The hero receives news of another child hostage from Kamikaze and heads back into the base.

Zombieman encounters Homeless Emperor and they battle. Homeless Emperor explains his history, motive and powers. Homeless Emperor claims God bestowed him his powers to wipe out humanity.

Sweet Mask discovers news of the second child hostage and destroys the incubators holding the Monster Cells produced by Orochi. Sweet Mask encounters Fuhrer Ugly and is forced back.

Gums sneaks up on Pig God and swallows him, Pig God manages to force his way out and they engage in a fight.

Atomic Samurai's Disciples encounter Evil Natural Water and the Mad Doctor Fish residing within it.

Puri-Puri Prisoner discovers a chained up Garou. Garou escapes and attacks the hero.

Saitama encounters Flashy Flash and decides to tag along with the S-Class hero. They continue to get lost within the Monster Association Headquarters.

Nyan attacks the hero support team and defeats most of the heroes. Drive Knight intercepts Nyan and defeats the monster cadre.

Drive Knight discusses with Sekingar about Bofoi. They are attacked by G5 but saved by Genos.

Drive Knight brings the near-dead Nyan with him for research. Genos escorts Waganma, Sekingar and the injured support heroes out of the Ghost Town of Z-City. Genos receives the data Drive Knight collected on the Monster Association's main forces.

Superalloy Darkshine discovers Puri-Puri Prisoner's beaten body. Superalloy Darkshine approaches Garou.

Child Emperor finds the downed disciples of Atomic Samurai and is attacked by Evil Natural Water and Mad Doctor Fish. Child Emperor fights the monsters but is put at a disadvantage when Sludge Jellyfish appears and is absorbed by Evil Natural Water.

Tatsumaki discovers a meat puppet within Gyoro Gyoro. Tatsumaki traces the controller 1500 meters underground to Psykos and restrains her. Psykos uses telepathy to call for Overgrown Rover's aid. Bang, Bomb and Fubuki fight Overgrown Rover and manages to stop Rover's rampage.

Tatsumaki senses Fubuki's psychic output.

Saitama and Flashy Flash find Manako. They force her to take them where the Monster King Orochi is. Saitama and Flashy Flash fight some monsters while travelling in a minecart.

Psykos drinks a concoction and breaks free from Tatsumaki's psychic binding.

Superalloy Darkshine and Garou battle.

Psykos and Orochi merge to fight Tatsumaki. King finds Tareo and heads out with him.

Genos joins Tatsumaki in fighting against merged Psykos and Orochi.

Genos gets incapacitated, Drive Knight joins Tatsumaki in fighting against merged Psykos and Orochi.

Puri-Puri Prisoner kills Vaccuma.png

Superalloy Darkshine kills Bug God.png

Saitama punches Rover.png

King intimidating a disguised monster.jpg

Devil Long Hair's defeat.png

Atomic Samurai defeats G5.png

Homeless Emperor meets God.png

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Drive Knight defeats Nyan.png

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Psykos Appearence Manga.png

Garou blocks Superalloy Bazooka.png


  • Approximate timeline of Saitama's promotions:
    • Week 1: C-Rank 388 (Saitama registers as a hero)
    • Week 2: C-Rank 342 (Post Sonic)
    • Week 2: C-Rank 5 (Post Giant meteor)
    • Week 3: C-Rank 2 (Pre-Seafolk invasion), then C-Class Rank 1 (After Deep Sea King incident)
    • Week 4: B-Rank 101 (Promotion)
    • Week 5: B-Rank 63 (At S-Class meeting)[1]
    • Week 6: B-Rank 7 (When Fubuki visited Saitama)[3]
    • Currently in Week 7-8


  1. One-Punch Man Manga; Chapter 31, page 26
  2. One-Punch Man Manga; Chapter 42, page 28
  3. One-Punch Man Manga; Chapter 43, page 37