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 on his personal homepage on June 3, 2009. The series quickly went viral and has since surpassed 55 million hits, with an average of 60,000 hits a day. The name is a play on the long-running children's character Anpanman, as punch (パンチ panchi) is not usually shortened to pan.
he story takes place in the fictional metropolis of City Z, Japan. The world is full of strange monsters that mysteriously appear and cause many disasters. Saitama, the protagonist, is a super powerful hero who easily defeats the monsters or other villains with one punch. However, after becoming too strong, Saitama has become bored of his powers and is always trying to find stronger opponents who can fight him.