One-Punch Man (Japanese: ワンパンマン Hepburn: Wanpanman?) is an ongoing Japanese webcomic created by an author using the pseudonym One, which began publication in early 2009. The series quickly went viral, surpassing 7.9 million hits in June 2012. The Japanese shortened name Wanpanman is a play on the long-running children’s character Anpanman (the form pan (パン?) is not a standard abbreviation for punch (パンチ panchi?)).
A digital manga remake of the series, illustrated by Yusuke Murata, began publication on Shueisha‘s Young Jump Web Comics website in 2012. Viz Media has licensed the remake for English serialization in its Weekly Shonen Jump digital magazine. A television anime adaptation by Madhouse aired in Japan between October and December 2015.
The story takes place in the fictional Japanese metropolis of City Z. The world is full of strange monsters that mysteriously appear and cause disasters. Saitama, the protagonist, is an incredibly powerful hero who can easily defeat the monsters or other villains with a single punch. However, due to his overwhelming strength, Saitama has become bored with his powers and is constantly trying to find stronger opponents who can present a challenge to him.
On his adventures, he meets new friends, enemies, and his own disciple, the cyborg Genos, and joins the Heroes Association in order to gain official recognition as a hero. Despite defeating many strong monsters that even the Heroes Association’s top members are unable to defeat, Saitama struggles to gain respect. Most people look down on him due to his plain physical appearance, and some accuse him of being a counterfeit hero. Only a small number of individuals recognize his incredible talent and humility towards others.