|Genre||Action, comedy, superhero|
|Original run||2009 – present|
|Illustrated by||Yusuke Murata|
|Magazine||Young Jump Web Comics|
|Original run||June 14, 2012 – present|
|Anime television series|
|Directed by||Shingo Natsume (season 1)|
Chikara Sakurai (season 2)
|Produced by||Chinatsu Matsui|
|Written by||Tomohiro Suzuki|
|Music by||Makoto Miyazaki|
|Studio||Madhouse (season 1)|
J.C. Staff (season 2)
|Original network||TX, TVO, TVQ, KBS, BS Japan, AT-X|
|Original run||October 5, 2015 – present|
|Episodes||12 + 6 OVA|
|Original animation DVD|
|One-Punch Man: Road to Hero|
|Produced by||Minoru Yamaoka|
|Written by||Tomohiro Suzuki|
|Released||December 4, 2015|
One-Punch Man (Japanese: ワンパンマン Hepburn: Wanpanman) is an ongoing Japanese superhero webcomic created by 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, wanpan being a contraction of wanpanchi ("one punch"). One-Punch Man tells the story of Saitama, an extremely overpowered superhero who has grown bored by the absence of challenge in his fight against evil and seeks to find a worthy opponent.
A digital manga remake of the series, illustrated by Yusuke Murata, began publication on Shueisha's Young Jump Web Comics website in 2012. The chapters are periodically collected and printed into tankōbon volumes, with sixteen volumes released as of April 4, 2018. Viz Media has licensed the remake for English serialization in its Weekly Shonen Jump digital magazine.
An anime television adaptation by Madhouse aired in Japan between October and December 2015. It was dubbed in English during the summer of 2016, and later that year a planned second season was announced. On September 25, 2017, it was announced that they would be changing both its production company and director.
On an unnamed Earth-like super-continent planet, powerful monsters and villains have been mysteriously appearing and causing disasters. To combat them, the world's government has created a Hero Association that employs superheroes to try and stop the violent creatures and villains. Each of the Hero Association's superheroes are ranked from Class-C to Class-S. Saitama is an unranked hero, hailing from the metropolis of City-Z, who performs heroic deeds for his own entertainment. He has trained himself and grown strong to the point where he can effortlessly defeat any opponent with a single punch. However, since Saitama became a hero for the fun of the experience, he has lately become bored with his superhuman power, and frustrated at the complete lack of strong opponents that can challenge him.
Over the course of the series, Saitama encounters various superheroes, villains, and monsters. He quickly gains a pupil that is a cyborg, Genos, who is on a revenge quest to find another cyborg that slaughtered his entire family and hometown. Eventually the two join the Hero Association in order to gain official recognition. Genos proves to be a prodigy and is instantly placed in Class-S, while Saitama barely passes the written test and is therefore placed in last place of Class-C, making him the lowest ranked hero. Saitama performs many feats that go mostly unnoticed and unappreciated by the public, such as defeating the ninja, Speed of Sound Sonic, and destroying an incoming meteor that was going to obliterate City Z. Saitama is promoted to Class-B, after he defeats the powerful Deep Sea King, who reigns destruction on City J. Monsters begin to appear in City-Z, searching for a mysterious Monster Association. Soon after, the great seer,Shibabawa, has a vision that the world is in danger. Panicking, the Hero Association calls all S-Class heroes to a meeting, begging them to protect the world. Immediately after the meeting, the powerful alien leader of the Dark Matter Thieves, Boros, invades the planet and destroys City-A. Saitama duels with Boros and defeats him by using a serious punch. During the invasion of aliens, the S-Class hero, Drive Knight, warns Genos that the S-Class hero, Metal Knight, is his enemy. The Hero Association salvages City-A with the help of Metal Knight, and they build a new base of operations that will allow the Hero Association to deploy heroes more easily.
Saitama begins to gradually know other superheroes. He quickly becomes friends with the old martial arts master, Bang, and the "most powerful" superhero named, King, who is actually a cowardly nonviolent otaku who got his S-Class position by accidentally receiving credit for many of Saitama's previous victories. When the Hero Association executive Sitch tries to recruit villains to become superheroes, Bang's former apprentice, Garo, emerges and starts beating down many of the other heroes, prompting the association to make a small effort to stop him.
In order to learn more about martial arts, Saitama enters a tournament in disguise. During the martial arts tournament, the Monster Association leads an all-out attack on multiple cities causing massive panic and damage. The Hero Association struggles to keep up with the attacks. Genos fights monsters and protects the tournament so that Saitama can safely compete. Despite being the most powerful hero in the world, Saitama automatically loses the tournament due to being caught wearing a wig and impersonating another martial artist, Charanko. Saitama flees the tournament in fear of being arrested by the police. During the award ceremony, the powerful monster, Gouketsu, lays siege on the tournament after defeating Genos in combat. Gouketsu presents monster cells that can turn humans into monsters after being ingested to the people of the stadium, telling them that he'll kill them if they don't ingest the cells. Some people partake of the cells becoming monsters, including the martial artist, Bakuzan. Saitama returns to the stadium after hearing explosions and the winner of the tournament, Suiryu's desperate cries for help. Saitama defeats Gouketsu and Bakuzan before they can slaughter innocent people. Saitama humbles Suiryu and inspires the cocky martial artist to become a hero.
The B-Class hero, Fubuki, tries to have Saitama join her faction of heroes. Garo, determined to become the most powerful monster, continues to grow stronger and stronger and hunts more heroes down including S-Class heroes, Tank-Top Master and Metal Bat. The Hero Association ranks him at a threat of "Dragon" level, the second highest that is possible. They fail to capture him after sending a team of A-Class heroes to stop him. Bang confronts Garo and almost kills him, but the Monster Association rescues him at the last second to try and recruit him. The Monsters continue to attack people and continue to gather in City-Z, being led by the powerful psychic, Gyoro Gyoro, and the monster king, Orochi. Garo refuses to join the Monster Association and continues to defeat heroes. Meanwhile, the Hero Association leads an all out war against the Monster Association with hundreds of heroes, after the monsters kidnap the child of a high ranking contributor to the Hero Association. A new association known as, The Organization, consisting of powerful robots, allies itself with the Monster Association by sending robots such as G5 to help in the war.
One Punch Man began publication in 2009 when One became interested in creating a comic super hero that was already the strongest in the world.  One had wanted to focus on different aspects of storytelling that standard super hero stories normally rely on, such as every day problems. One said, "Punching is oftentimes pretty useless against life’s problems. But inside One Punch Man’s universe, I made Saitama a sort of guy who was capable of adapting his life to the world that surrounded him, only armed with his immense power. The only obstacles he faces are mundane things, like running short of money." One self published the series on the website Nitosha, a Japanese site for publishing online manga.
The series was an instant success online, where One generated thousands of viewers and comments within weeks.  According to One, the series really began to take off by the time he had written the fifth chapter.  On Nitosha, a series was considered popular if it consistently received at least 30 comments, but by the time One had published chapter 30, he was receiving nearly a thousand comments per chapter.  In February 2010, One put the series on hiatus in order to focus on work for his family. 
When One returned to drawing manga in 2011, he was contacted by Yusuke Murata about a possible partnership, where Murata would redraw the manga for One. Murata had been an enormous fan of One Punch Man, and was ill at the time. Fearing that he was going to die, he contacted One. Reflecting back he said, “Around that time, I was actually really sick. I broke out in hives, my inner organs were infected, and I couldn't breathe well with my windpipes swelling. I was in the hospital when I thought, "Ah, I guess people die just like that." If I'm going to die, I want to do something I really love to do. I want to draw manga with Mr. ONE. That's what I thought.”
One began publishing One-Punch Man as a webcomic in 2009. As of May 2018[update], the webcomic has released 134 chapters. When the series became popular, receiving 7.9 million hits by June 2012, Yusuke Murata contacted One with a proposal to redraw the comic for digital publication in Weekly Young Jump's spin-off manga website Young Jump Web Comics (となりのヤングジャンプ Tonari no Yangu Janpu), published by Shueisha. The first chapter was published on June 14, 2012. The chapters are periodically collected and printed into tankōbon volumes, with sixteen volumes released as of April 4, 2018. A drama CD was bundled with the ninth volume, which was released in August 2015.
The series began publication in Viz Media's Weekly Shonen Jump (Shonen Jump Alpha at the time) in North America on January 21, 2013. The first digital volume was released in February 2014. One-Punch Man was one of a number of series that Viz made available on ComiXology in June 2014. The manga was released in print in the United States starting in September 2015.
An anime adaptation was announced in the 15th issue of Weekly Young Jump on March 10, 2015. The series' first season was directed by Shingo Natsume at Madhouse and written by Tomohiro Suzuki. The series also features character designs by Chikashi Kubota, who also serves as chief animation director, music by Makoto Miyazaki and art design by Shigemi Ikeda and Yukiko Maruyama. Ken Hashimoto serves as the series color key artist, Akane Fushihara is the director of photography and Kashiko Kimura serves as the series editor, and Shoji Hata does sound design. The opening theme song is "The Hero!! ~Ikareru Ken ni Honō o Tsukero~" (THE HERO!! ～怒れる拳に火をつけろ～, "The Hero!! Set Fire to the Furious Fist") by JAM Project, and the closing theme is "Hoshi Yori Saki ni Mitsukete Ageru" (星より先に見つけてあげる, "I'll Find It Before the Stars for You") by Hiroko Moriguchi.
One-Punch Man's first season aired in Japan between October 5, 2015 and December 21, 2015 on TV Tokyo, airing at later dates on TVO, TVQ, KBS, BS Japan, and AT-X, and ran for 12 episodes. The season streamed on Niconico and was simulcast on Hulu, Daisuki, and Viz Media's Neon Alley service. A preview screening of the first two episodes was held in the Saitama City Cultural Center on September 6, 2015. The series is licensed by Viz Media in North America, by Kaze UK in the United Kingdom, and by Madman Entertainment in Australia and New Zealand. An original video animation was released with the tenth manga volume on December 4, 2015. Additional OVA episodes are included with Blu-ray Disc & DVD volumes of the season, the first of which was released on December 24, 2015. Murata announced in the last weeks of the first season's airing schedule that he was working on making a second season a reality, but had not confirmed it was in development as of December 2015[update].
A second season was later confirmed in September 2016 and is currently in production. The second season will be animated by J.C. Staff with Chikara Sakurai replacing Shingo Natsume as director and Yoshikazu Iwanami replacing Shoji Hata as sound director. Tomohiro Suzuki, Chikashi Kubota and Makoto Miyazaki will reprise their roles as series composer, character designer and music composer, respectively. On August 12, 2018, it was announced that the second season would begin airing in April 2019.
Viz Media announced that they were working on an English-language dub of One-Punch Man at Anime Boston 2016. On July 1 of the same year, it was announced during Toonami's Anime Expo panel that the series would begin airing on July 16, 2016.
One-Punch Man had 2.2 million copies in print in November 2013, 3.2 million copies in April 2014, and 4.5 million copies in November 2014. By November 2016, this number had grown to 11.1 million copies in print. The series was one of ten nominated for the seventh annual Manga Taishō Awards in 2014. As of July 2017, the manga had 13 million copies in print. As of April 4, 2018, the manga had 15 million copies in print.
Once released in the United States, both the first and second volumes debuted on the New York Times Manga Best Sellers list, at first and second place, respectively, and stayed there for two weeks. Volume one dropped to second place for the third week, while volume two fell off the list altogether. Volume one was still on the list for a fourth week.[needs update] The series was nominated for an Eisner Award in 2015.
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|Wikimedia Commons has media related to One Punch-Man.|
- Official website for original webcomic (in Japanese)
- Manga official website at Young Jump Web Comics (in Japanese)
- Manga official website at Viz Media's Weekly Shonen Jump website
- Anime official website (in Japanese)
- One-Punch Man profile at Adult Swim
- One-Punch Man (manga) at Anime News Network's encyclopedia