Rai (pronounced “rye”) appeared in books published by Valiant Comics. Rai was the first original hero created by Valiant and had its beginning as a flipbook back-up feature in Magnus Robot Fighter issues #5-8. The popularity of the flipbook back-up story later led to an ongoing series. Valiant Entertainment is the current owner of Rai and the rest of the original Valiant Comics characters.
In his original incarnation, Rai is the spirit guardian that protects the nation of Japan in the 41st century. It is a mantle passed down from father to son through the generations. As such, the series chronicled a number of protagonists.
A new Rai ongoing series was launched in April 2014 by the creative team of writer Matt Kindt and artist Clayton Crain, selling out of its initial print run.