One-Punch Man (Japanese: ワンパンマン, Hepburn: Wanpanman) is a Japanese superhero franchise created by the artist ONE. It tells the story of Saitama, a superhero who can defeat any opponent with a single punch but seeks to find a worthy foe after growing bored by a lack of challenge due to his overwhelming strength. ONE wrote the original webcomic version in early 2009, and it quickly grew in popularity, surpassing 7.9 million hits in June 2012. The series has since received manga and anime adaptations.
The series' digital manga remake began publication on Shueisha's Tonari no Young Jump website in 2012. The manga is illustrated by Yusuke Murata, and the chapters are periodically collected and printed into tankōbon volumes. As of December 2019, 21 volumes have been released, 20 of which have been republished in English. Viz Media has licensed the remake for English serialization in its Weekly Shonen Jump digital magazine. Its English release was nominated for an Eisner Award in 2015 and a Harvey Award in 2016.
The series' anime adaptation was created by Madhouse and aired in Japan between October and December 2015. It was dubbed in English during the summer of 2016, and a second season was announced later that year. On September 25, 2017, it was announced the production company and director had changed. The second season was animated by J.C.Staff, with Chikara Sakurai replacing Shingo Natsume as director and Yoshikazu Iwanami replacing Shoji Hata as sound director. The second season aired between April and July 2019.