Shin Getter Robo
English name: New Getter Robo
Genres: Action, Adventure, Horror, Sci-Fi
Type: OVA, Episodes: 13
Aired: Apr 9, 2004 to Sep 10, 2004
Studio: Brain's Base
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
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)