I Am a Hero is a Japanese zombie manga series written and illustrated by Kengo Hanazawa. It was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from April 2009 to February 2017, with its chapters collected in 22 tankōbon volumes. In North America the manga has been licensed for English language release by Dark Horse Comics.

Big Comic Spirits is a weekly Japanese seinen manga magazine published by Shogakukan. The first issue was published on October 14, 1980. Food, sports, romance and business are recurring themes in the magazine, and the stories often question conventional values. The magazine is published every Monday. Circulation in 2008 averaged over 300,000 copies, but by 2015 had dropped to 168,250. In 2009, Shogakukan launched a sister magazine, Monthly Big Comic Spirits.