Mushoku Tensei: Isekai Ittara Honki Dasu (無職転生 〜異世界行ったら本気だす〜, literally Jobless Reincarnation: I Will Seriously Try If I Go To Another World), is a Japanese web novel series by Rifujin na Magonote and is published on internet web novel website Shōsetsuka ni Narō (Shortened to Syosetu) about a jobless, hopeless man who dies in an accident and reincarnates in a fantasy world, this time determined to have a bountiful and earnest life. It was serialized between November 22, 2012 and April 3, 2015.
A year later, it was announced the series would receive a light novel release under Media Factory's MF Books imprint; the illustrations are done by a Pixiv user called SiroTaka. A manga adaptation by Yuka Fujikawa began serialization in the June 2014 issue of Monthly Comic Flapper. Seven Seas Entertainment licensed the tankōbon volumes of the manga for localization in North America. The company also has licensed the original light novels. On Syosetu's rankings, the web novel has made cumulative appearances as the most popular work on the website.
Just when an unemployed thirty-four-year-old otaku reaches a dead end in life and decides that it’s time to turn over a new leaf—he gets run over by a truck and dies! Shockingly, he finds himself reborn into an infant’s body in a strange new world of swords and magic.
His new identity is Rudeus Grayrat, but he still retains the memories of his previous life. Follow Rudeus from infancy to adulthood, as he struggles to redeem himself in a wondrous yet dangerous world.
Rifujin na Magonote published his work on the online web novel website, Shōsetsuka ni Narō (Shortened to Syosetu); the first chapter was uploaded on November 22, 2012.
In November 2013, the author announced his work was to released as a light novel under Media Factory's MF Books imprint; regardless, the author stated his intentions to continue publishing his chapters online. The illustrator for the light novel is a Pixiv user called SiroTaka. Seven Seas Entertainment has licensed the light novels for publication in North America.
In the May 2014 issue of Monthly Comic Flapper, it was announced that the manga adaptation of Mushoku Tensei by Yuka Fujikawa would premiere in the June issue; though Yuka is the author of the manga series, character designs are credited to SiroTaka. Media Works collected the individual chapters into tankōbon volumes; the first volume was released in October 2014. In January 2015, Seven Seas Entertainment announced its licensing of the manga series for localization in North America under the title Mushoku Tensei: Jobless Reincarnation.