Kotetsu Jeeg (鋼鉄ジーグ, Kōtetsu Jīgu), more commonly known as Koutetsu Jeeg, Steel Jeeg or even "El Vengador", is another classic Humongous Mecha anime created by Go Nagai in cooperation with Tatsuya Yasuda. The anime TV series was produced by Toei Doga. It was first broadcast on Japanese TV in 1975. The series lasted for 46 episodes. Steel Jeeg also ran as a manga in several children's publications.Essentially a Combining Mecha series, it told the story of Shiiba Hiroshi, a car racer who's reconstructed as a cyborg by his father after being mortally wounded in an accident. As a cyborg, Hiroshi's capable of transforming into the eponymous Kotetsu Jeeg, a steel robot head that combines with a variety of external parts to form a giant robot and fight the minions of Queen Himika, leader of the Jamatai Kingdom.The series received a sequel, Kotetsushin ("Steel God") Jeeg in 2007, taking place fifty years after the original and featuring both new and classic characters.
Bare-Handed Blade Block: A subversion. In the ending credits, Jeeg blocks a downward, vertical swing... by crossing its forearms above its head. Of course, given that Jeeg is a robot, hence it is not made of flesh, it is not worried about the weapon slicing it, and the blade shatters upon impact.
Beneath the Earth: The Jamatai Kingdom were a subterranean civilization. They had attempted to conquer Japan in ancient times but they were defeated and fled underground. Big Bad Queen Himika definitely harbored a grudge afterwards and longed for revenge.
BFG: The Jeeg Bazooka is larger than Jeeg itself in both series.
Big Bad: Queen Himika except in the second half of the original series where she is replaced by the Dragon Emperor (aka Ryuu Teio).
Combining Mecha: An interesting version: Hiroshi is a cyborg who transforms into a giant head, which then combines with man-made parts to form a Humongous Mecha. In the Revival-slash-AlternateUniverse sequel Koutetsushin Jeeg, a transforming motorcycle forms the head of the titular mecha, which otherwise functions exactly like its precursor.
Detachment Combat: Given that Jeeg is able to use magnetism to pull its body parts together or replace them, it also can use them like weapons separately or shoot them (sometimes it did that with just its head!).
Do-Anything Robot: Jeeg is very modular: it can detach and reattach its parts like Lego bricks. Therefore, as long as they can get the right parts to the battlefield, Jeeg can change form to meet any situation.
Doing In the Wizard: In Kotetsushin, we find out that Himika and everybody that's presumably mystical are really aliens. The Bronze Bells were the reactors for an ancient ship. The Dragon Emperor isn't mentioned at all, either.
Although possibly a subversion in that the Jama Kingdom are still said to derive their powers from sorcery.
Expository Theme Tune: "Just you watch, the Haniwa Phantoms will be completely destroyed. Run forth, Banban Baban! Big Shooter, swifter than the wind. Build up!"
Falling into the Cockpit: Subverted: Kenji's forced to take control of the new Jeeg when a Haniwa Phantom God attacks, but in the next episode it's revealed that he had been intended to be the pilot all along — the attack simply forced the New Build Base crew to put him into the robot sooner than planned.
Formula One: With Hiroshi and Don being race car drivers they did drive these in the original series.
Ice Queen: The Princess of Snow from episode 10 of the original series.
Kid Hero: Averted. Hiroshi is twenty-five years old.
Kryptonite Factor: In the original series Steel Jeeg was weakened when making contact with electricity as it affects the magnetic power that binds his body together. Episode 5 also reveals that strong magnetic storms like solar flares prevent him from combining (at least until they made a special coating spray).
Lady of War: Captain Yagyu of the Build Angels, from Kotetsushin.
Lost Technology: Dr. Shiba finds several ancient mysterious magical artifacts and hieroglyphs during an archaeological expedition. His findings provide evidence that the ancient lost kingdom of Jamatai that thrived in the south of Japan has survived, and its Queen Himika is preparing to invade Japan. Of course, his reaction was using that lost technology to get a countermeasure ready (i. e., turning his eldest son into a cyborg capable transforming into a Humongous Mecha)
Married to the Job: Hiroshi did not knew why his father was always working and he barely talked to his family, and after several years, he decided he did not care about it or his father. When he learnt his reasons, he kind of forgave Prof. Shiba, but his mother still called her husband on it.
Marshmallow Hell: Kenji is the target of this... from Monko, much to his dismay.
Omnidisciplinary Scientist: Dr. Shiba. He was an archaelogist, but he could also heal his son's scarred body, make a cyborg, build giant robots and flying vehicles, and transfer his mind into a computer.
Red Shirt Army: Subverted in early episodes of Kotetsushin Jeeg. The JSDF -that usually is utterly useless in most anime shows- display competent tactics in their battle against Himika's Haniwa Genjin, and although Jeeg spearheads their attacks, he can't do it alone. They pay a high death toll, of course, but they are not completely exterminated.
Rip Van Winkle: In Kotetsushin, Tatsuko Mido and Monko Saotome of the Build Angels; later, the JSDF forces found within the zone on Kyushu, and Hiroshi.
When Kenji's Jeeg combines with Balba, its arrangement is vaguely reminiscent of Archduke Gorgon. The Haniwa Phantom he defeats in this form, Banshouraguu, also heavily resembles the Great General of Darkness, also from Great Mazinger.
Wham Episode: Episode 10 of Kotetsushin; Tsubaki gets possessed by Himika, who then extracts both Bronze Bells, Kyo reveals he (and the Jama Empire as well) is not only an alien, but also Kenji's uncle AND reveals that Kenji himself is half-alien, Tsubaki descends from a clan of priestesses that have protected Kyo's bloodline, and Build Base gets destroyed. To top it off, Kyo sacrifices himself so that everyone can escape.