Following sporadic guest appearances, Samurai becomes a prominent team member in the series' later seasons.

Toshio Eto is a history professor who gained his powers after being struck by a beam of light sent by the New Gods of New Genesis, who were trying to create superheroes to battle Darkseid.

[1] Samurai made DC comics appearances during the Justice League/Justice Society of America crossover featured in the Brightest Day event.

Toshio appears as one of the heroes driven insane by Alan Scott's Starheart before being defeated by Jesse Quick and Congorilla.

[3] In Doomsday Clock, Samurai joins Japan's superhero team, Big Monster Action.