What Is The Serious Punch And Why It’s Not Even Saitama’s Strongest
- Pavas Gagneja
- Jul 22
- 3 min read

SPOILER ALERT: This article contains major spoilers from the One Punch Man manga, including shocking plot points, final battles, and major plot twists not yet covered in the anime. Proceed only if you're caught up or don't mind having key story elements revealed.
One Punch Man fans know that perfect moment when Saitama gets serious. His Serious Punch is famous for saving the world, but did you know it is not even his strongest move? Let’s dive into how Serious Punch works and why Saitama is on a whole different level, even compared to his own serious attacks.
If you love One Punch Man, you might feel that Saitama’s Serious Punch is unbeatable. It looks awesome, it sounds cool, and usually it ends the fight with one move. But the more you look at the manga and anime, you realize Saitama is always holding back, even when he calls a move serious. There are even stronger attacks in his toolkit, ones that can blow planets apart or even mess with time itself.
What Is Saitama's Serious Punch?

When Saitama first used his Serious Punch, it was against Boros, the super powerful alien boss. Boros was about to destroy the planet with a huge energy blast. Saitama just stepped up, said 'Killer Move: Serious Series Serious Punch,' and fired off a punch so strong it split the clouds on Earth. But fans noticed something — Boros admitted Saitama was still not using his full power, even then.
In One Punch Man, a Serious Punch isn’t some super fancy martial arts technique. It’s just Saitama deciding to throw a punch with a bit more effort than normal. Usually, Saitama beats Monsters and villains with almost no effort at all. A Serious Punch is how he shows a little respect for worthy opponents, but it is still way below his true power. Even when he fought Monsters like Elder Centipede or Evil Natural Water, one Serious Punch was enough.
Why Serious Punch Isn’t Saitama’s Strongest Move

After the fight with Boros, Saitama’s battles only got crazier. In his war with Garou, the Hero Hunter, Saitama had to pull out even bigger moves. He invented Serious Punch² — a punch so strong that it clashed with Garou’s copycat move, and the energy from that punch wiped out a bunch of stars in space. The shockwave was so insane that Blast, the number one S-Class hero, had to move the fight far away just to prevent Earth from being destroyed.
But it does not stop there. In the heat of that same battle, Saitama sneezed. Yes, he sneezed by accident and blew away half of Jupiter, the biggest planet in our solar system. The manga called it “Serious Sneeze,” and even that wasn’t aimed at Garou. It just happened while Saitama was messing around during the fight. These attacks make it clear that Serious Punch is not his ceiling. Instead, every time the stakes rise, Saitama matches them. His limit has never been shown.
The Secret Behind Saitama’s Strength

There is a running joke and mystery in One Punch Man about how Saitama actually got this strong. After three years of regular daily training — 100 push-ups, 100 sit-ups, 100 squats, and a 10km run, he broke his limiter. That means the universe itself stopped limiting his power. Now, when Saitama fights, he only uses as much strength as he needs to win. He never wastes energy. A “Serious Punch” could be 1% or 80% of his full power.
What makes his fighting style so interesting is that he names his moves just for fun. Even Serious Punch is only really serious compared to his normal attacks, which are already strong enough to destroy Monsters nobody else can beat. When the enemy is tough enough to survive, that is when Saitama starts inventing new Serious moves, like Serious Table Flip or Omnidirectional Serious Punch, just for the excitement.
Final Verdict: Saitama’s True Strength Is Still A Mystery

Saitama is more than just the hero who wins with one punch. His Serious Punch is legendary, but it is not even close to his true limit. Each new fight pushes Saitama to get a bit more creative, but he always holds back just enough so he does not destroy everything by accident. His strongest punches can erase stars, destroy moons, or even travel through time.
The best part is that even Saitama is kind of bored and waiting for a real challenge. Maybe one day we will see Saitama use his full power, but so far, no enemy in One Punch Man has pushed him that far.
Release Year | MAL Rating | Animation Studio | Genre | Watch On |
October 2015 | 8.49 | Madhouse, J.C. Staff | Action, Comedy |