Reborn!, known in Japan as Katekyō Hitman Reborn! (家庭教師ヒットマンREBORN! Katekyō Hittoman Ribōn!?, "Katekyō" being a portmanteau of Katei Kyōshi and translated as Home Tutor), is a Japanese manga written and illustrated by Akira Amano. The plot revolves around the life of a young boy named Tsunayoshi Sawada, who finds out that he is next in line to become the boss of the most powerful Mafia organization called Vongola, the Vongola Family. As such, the Vongola's most powerful hitman, a gun-toting infant named Reborn, is sent to tutor "Tsuna" on how to become a respectable boss.
The individual manga chapters were serialized in Japan in Shueisha's Weekly Shōnen Jump from April 4, 2004 and ended in November 12, 2012 and have been published into forty-two tankōbon volumes as of March 4, 2013. Viz Media licensed the series for an English language release in North America, shortening the series name to Reborn!. An anime adaptation of the series by Artland aired on TV Tokyo between October 7, 2006 and September 25, 2010. There have also been various video games based on the series, as well as two light novels by Hideaki Koyasu.
Reborn! has become one of the best-selling Weekly Shōnen Jump manga with several of its volumes becoming top-sellers in Japan. Reviewers from the series praised its use of comedy as well as the designs used for the infant characters. They also mentioned that though it has become more violent since volume 8, it has turned into a more typical shōnen series, praising the storylines and the fights.