Cannon God Exaxxion (Japanese: 砲神エグザクソン, Hepburn: Hōjin Eguzakuson) is a seven volume manga by Kenichi Sonoda that deals with Earth's fight against alien colonization with the help of giant robots and super powered battle suits.

At the tenth anniversary of first contact with the Riofaldians, an alien race, the unveiling of an Elevator Ship, designed for orbital transport to and from the Riofald home world and Earth, is about to take place.

The series was published in North America by Dark Horse Comics but they unexpectedly stopped and currently have no plans to release the last two volumes in English.

Riofaldian military vehicles, including XXX Units, also rely heavily upon generating and shaping gravity and inertial fields that lessen impacts and allow vehicles to "fall up", bypassing many of the physical and mechanical limitations that the square-cube law usually imposes upon large structures: For example, Exaxxion walks on cushions of focused electromagnetic fields to prevent its feet from sinking into the ground.

Exaxxion is irreplaceably unique; The technology used to construct its power plant can no longer be replicated by modern Riofaldian engineering as of the time of the manga's setting.