Groizer X (Japanese: グロイザーX, Hepburn: Guroizā X) is an anime series aired from 1976 to 1977. There were 36 episodes. It is also referred to as Gloyzer X and Gloizer X.

Groizer X
(Guroizā X)
Written byGo Nagai
Illustrated byPanchosu Ishiwata
Published byAsahi Sonorama
MagazineManga Shōnen
Original runJune 1976September 1976
Anime television series
Directed byHiroshi Taisenji
Produced byKiyoshi Nishino
Norio Kondo
Written byToyohiro Andō
StudioKnack Productions
Dynamic Productions
Original networkTokyo Channel 12
Original run July 1, 1976 March 31, 1977
Written byGo Nagai
Illustrated byGosaku Ota
Published byShogakukan
Original runAugust 1976February 1977
Written byGo Nagai
Illustrated byShigeru Akimoto
Published byShogakukan
MagazineShogaku Ichinensei
Original runSeptember 1976December 1976


The Gaira aliens, hidden in the Arctic, plan to conquer Earth. Captured and forced to work for the aliens, Dr. Yan creates the ultimate weapon, a transformable aerial robot called Groizer X. Groizer X was 100 meters tall and weighed 1200 tons. Entrusted to his daughter Rita, Groizer X escapes the clutches of the Gaira and lands in Japan, where pilot Joe Kaisaka meets a wounded Rita. Taking up the controls of Groizer X, Jo and Rita fight against the Gaira invasion.


The anime was created by Go Nagai and Gosaku Ota as a side project during the time they were busy with the various Mazinger series, Groizer X nevertheless managed to be converted into a TV series. The robot transforms into a jet, while the show included intense battle sequences and aerial combat, it remained a secondary super robot series.


Japanese Name Voiced by
Joe Kaisaka Tōru Furuya
Rita Yan Kiiko Nozaki
Baku Naoki Tatsuta
Dottor Yanki
Prof. Tobishima Hisashi Katsuta
Ghelden Narratore


The original Groizer X toyline are one of the very few Super Robot toys produced by Namco instead of the industry dominant Popy.[1]

Yamato then did a GN-U Groizer X figure released in 2007. A Manga version of the figure was produced, only painted in green.

Outside JapanEdit

While not being a great success in Japan, Groizer X had a considerable impact in Brazil, where it was aired under the name O Pirata do Espaço ("The Space Pirate") in 1984/1986 at the Manchete Network. Only two 70's mecha anime were shown in the country up until that point, and Groizer X was the only one to air in its entirety (Voltes V, the other one, only aired for five episodes). In Latin America, the anime was aired under the name El Justiciero. In Italy it was one of the few robotic anime to be aired on Silvio Berlusconi's Canale 5, in 1981, where it failed to garner much following and was never replayed.

References in other seriesEdit

In the 2009 anime Mazinger Edition Z: The Impact!, Count Brocken deploys an updated Groizer, "Groizer X-10" to attack Mazinger Z and the Mazinger Corps. Later on, Groizer's X-9, X-11 and X-12 are also shown, used by the Count to sink the Submarine Fortress Saluud.


  1. ^ Toybox DX. "Toybox DX." Nakajima Diecast. Retrieved on 2006-11-21.

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