Majin Tensei was one of the first manga serialized within Enix's Monthly GFantasy starting in April 1994 and concluding in August 1996. While originally planned to span three tankouban volumes, the manga's popularity allowed it to grow to five volumes total. The manga is set after the great war of the late 1990s as Japan begins construction on a new capital city. Earthquakes cause massive destruction and rumors of demons have begun to emerge. The protagonist receives a warning and a demon summoning program.