Shin Getter Robo

Humanity is under attack by demonic creatures called Oni. Unable to fight back by any other means, the scientist Dr. Saotome creates a series of giant robots that harness the mysterious power of Getter Rays, giving them the strength necessary to fight the Oni. The strongest of these is Getter Robo, and Saotome must enlist three very different men to pilot it - martial artist Ryoma Nagare, criminal leader Hayato Jin, and monk Benkei Musashibou. Together, the Getter Team fights to end the Oni menace forever. (Source: ANN)

Type: OVA
Rating: R - 17+ (violence & profanity)
Season: spring 2004
Status: Finished Airing
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Tags: action sci-fi science fiction primarily male cast mecha adventure manga martial arts shounen demon demons male protagonist earth japan seinen asia super robot violence horror isekai gore gods post apocalypse post-apocalyptic time travel piloted robot time manipulation transforming craft dinosaurs