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UFOs and aliens from beyond the stars are common themes in media, entertainment, and other forms of science fiction; however, many individuals have sworn they have seen UFOs and have been abducted in real life! Sit back and watch as the makers of Mazinger take you on a journey through the history of UFO lore. Could it be that UFOs are real and that aliens watch us from afar? [from anime-planet]

From the far end of the universe, the terrifying space monster Gilgilgan attacks the Earth. The Science Fortress Laboratory and the Saotome Institute both fight against this threat. Distracted by their rivalry, Getter Robo and Great Mazinger are forced to retreat from Gilgilgan's sharp fangs, but once they agree to work together they begin their combined attack!

Go Nagai crossover movie.

When the Vegan empire dispatches a new general to oversee the takeover of Earth, he quickly manages to capture Koji Kabuto and, learning of Great Mazinger through interrogation, quickly commandeers it from a museum where it was ke...

A giant sea monster known as "Dragonsaurus" has emerged from out of nowhere, terrorizing the depths of the oceans. Great Mazinger, Grendizer and the Getter Robo G team join forces to combat the new threat. But their task becomes more complicated when Dragonsaurus swallows up Boss Borot and makes its way towards Tokyo. (Source: Anime News Network)

The evil Mycene Empire unleashes its army against humans in a world wide strike. Koji Kabuto must risk his life in a desperate journey to find Mazinkaiser so he can defend the Earth against this ruthless new enemy.

The WSO has learned that the Gravity Curtain has reached an unstable status and will explode within 66 hours, destroying all of Earth and human life itself. Each of the three factions controls a part of the mechanism responsible f...

The film is commemorating the 45th anniversary of the original Mazinger Z series. It has been 10 years since then. Humanity awaits a new fate. Once humanity was on the verge of destruction at the hands of the evil scientist Dr. Hell and his underground empire. Kouji Kabuto, his Mazinger Z super robot, and his friends at the photon power laboratory put an end to Dr. Hell's evil ambitions, and returned peace to the world. It has been 10 years since then. Kouji has followed his father and grandfather and now walks the path of a scientist. He encounters a mysterious life form buried in a giant structure buried deep below Mt. Fuji. A new encounter, a new threat, and a new fate await humanity. And Kouji, who was once a hero, makes a decision for the future. It can be a god or a demon. Once again the future is entrusted to Mazinger Z. (Source: Anime News Network)