One Punch Man

Synopsis

Saitama is an ordinary young man living in the fictional City Z, in a world where monsters and superhuman threats are a daily occurrence. After a chance encounter with a crab monster, he decides to become a hero out of passion. For three years, he follows a spartan but simple training regimen: 100 push-ups, 100 squats, 100 sit-ups, and a 10 km run every day, with no air conditioning or heating. The result defies all logic: Saitama becomes so strong he can defeat absolutely any enemy with a single punch. He also loses all his hair in the process.

This absolute power, far from being a blessing, plunges Saitama into existential depression. Battles that should be epic end in a fraction of a second. He no longer feels any excitement or challenge. When he meets Genos, a vengeful cyborg who becomes his disciple, Saitama discovers the Hero Association, a hierarchical organization that ranks heroes by class. Despite his incomparable strength, Saitama is ranked Class C due to his poor written test scores, and nobody takes him seriously.

Across successive arcs, Saitama faces increasingly absurd threats: the alien invasion led by Boros, the monster Garou who wants to become absolute evil, and the Monster Association. Each arc deconstructs the conventions of shonen battle manga by showing that raw power solves neither personal problems nor social injustices. Secondary characters — Genos, King, Mumen Rider, Fubuki — offer varied perspectives on what it truly means to be a hero.

Themes and Influence

One Punch Man is primarily a satire of shonen culture and the superhero genre. By making its protagonist invincible from the start, ONE inverts the classic formula of the hero who grows stronger: here, power is the problem, not the solution. The work explores existential boredom, the search for meaning in a world where one has achieved everything, and the gap between social recognition and true worth. The absurd bureaucracy of the Hero Association parodies Japanese hierarchical structures.

ONE's original webcomic, drawn in a deliberately crude style, was published online starting in 2009. The redrawn version by Yusuke Murata, serialized in Tonari no Young Jump since 2012, became famous for its spectacular action spreads. Season 1 of the anime by Madhouse (2015), directed by Shingo Natsume, was universally praised for its exceptional animation quality. The series helped popularize superhero deconstruction within manga and anime.