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Dinosaur Great War Izenborg (恐竜大戦争アイゼンボーグ Kyōryū Dai Sensō Aizenbōgu) was a Japanese television program produced by Tsuburaya Productions that aired from 1977 to 1978 on Tokyo 12 Channel. It is unique in that it combined Tsuburaya's trademark suitmation tokusatsu techniques with Japanese Animation. The show runs for about 39 episodes.

In the universe where Izenborg is set, the Ultraman Series are popular TV shows.


The Crew of Izenborg


Dinosaurs reappearing on Earth, stronger and more intelligent than before, led by Dinosaur Satan Gottes, an evil humanoid from the Black Nebula, and this time they are back to rule earth once more and wipe out humankind. They are alive and even thriving, in an underground Empire they built. In 1986, Ururu, the leader of dinosaurs, declares war against humanity. In an attempt to reclaim the Earth's surface, some of the dinosaurs evolve into deadly monsters, and start wreaking havoc on the human population centers around the globe. Story revolves around the D Force (D戦隊 D Sentai), and its two members, a brother and sister team of Tachibana Ai (立花 愛) and Tachibana Zen (立花 善), the Special OPs force, whose mission is to combat evolved dinosaurs and protecting the humanity at all cost. However, early in the series the siblings suffered a near fatal injury from the massive explosion during the test of a prototype super-tank, "predecessor to Izenborg". Their father died in the explosion. They survived, barely clinging to life. In order to keep them alive they needed to receive a cybernetic body parts and other implants so they could function normally within the society, and to synchronize with their combat vehicle and form the system known as Izenborg (Ai + Zen + Cyborg) (called Gemini in the US movie) and fight the Dinosaurs. Before the Izenborg process, each sibling has only a robotic half, interwined with the human one (Zen, robot right half - Ai, robot left half). During the Izenborg process, Zen inherits both the human "halves" and become the pilot known as Izenborg Man, Ai inherits both the robotic "halves" and become the Mother Computer of the ship, the tank Izen-I converts into the powerful ship Izenborg-Go.                                                                                

During episode 20, Ai and Zen were able to combine into a "second step fusion", the giant humanoid Izenbo. Zen becomes Izenbo, while Ai - inside a modified version of the Izenborg-Go - is embedded into the head and provide the main body with energy and additional computing faculty.

Izenborg-Go Profile

  • Height: 33 m
  • Width: 17 m
  • Weight: 154 t
  • Active Time: 3 minutes and 30 seconds



The series had a good popularity in Japan. In Italy and Saudi Arabia it became a big hit. The series was re-aired on the Italian channel Man-Ga in 2012, and the Yamato Italian DVD set got huge sales. In 2013, this along with the rest of the Tsuburaya Dinosaur Trilogy were released on DvD by Toei Video.

In 2020, it was announced Matt Frank would create a Dinosaur Great War Izenborg comic, continuing the adventures of Ai and Zen. The comic is planned for release in 2021.


  • Ururu, the Tyrannosaurus villian of the first 19 episodes was a reused suit from from The Last Dinosaur (1977). Many of the dinosaur suits would go on to star in Koseidon.
  • Dinosaur Great War Izenborg was created after the stop motion and puppet show series, Born Free. The sequel series, Koseidon, had a human sized hero and did fairly well.
    • The show is both live action and animated.
  • The show involves dinosaurs reappearing on Earth, more intelligent than before.
  • The Stegosaurus suit that were used for Gallon, Stella, Sugora, and Sutego would later on be reused in the last entry to the Dinosaur Trilogy: Dinosaur Squadron Koseidon as Stegosaurus (Koseidon).

External Links

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Spin-Offs Andro Melos | Ultraman Tiga Gaiden: Revival of the Ancient Giant | Ultraman Dyna: The Return of Hanejiro | Ultraman Gaia: Gaia Again | Ultraman Mebius Gaiden: Hikari Saga | Ultraman Mebius Gaiden: Armored Darkness | Ultraman Mebius Gaiden: Ghost Rebirth | Ultra Galaxy Legend Gaiden: Ultraman Zero vs. Darklops Zero | Ultraman Zero Gaiden: Killer the Beatstar | Ultra Zero Fight | Ultra Fight Victory | Ultraman Orb THE ORIGIN SAGA | Ultra Fight Orb | Ultra Galaxy Fight: New Generation Heroes | Ultra Galaxy Fight: The Absolute Conspiracy | Sevenger Fight | Ultra Galaxy Fight: The Destined Crossroad
Other Series Captain Ultra | Mighty Jack | Operation: Mystery | Mirrorman | Redman | Triple Fighter | Emergency Directive 10-4·10-10 | Iron King | Fireman | Jumborg Ace | Mirror Fight | Army of the Apes | Pro-Wres no Hoshi Azteckaiser | Dinosaur Expedition Born Free | Dinosaur Great War Izenborg | Dinosaur Squadron Koseidon | Gridman the Hyper Agent | Superhuman Samurai Syber-Squad | Mirrorman REFLEX | Bio Planet WoO | Mirror Fight 2012 | Ultraman The Prime | Ultra Science Fantasy Hour | Gridknight Fight
Anime The☆Ultraman | Ultraman Kids | Ultraman Graffiti: Wild! Ultra Country | Ultraman: Super Fighter Legend | Ultra Nyan | Gridman the Hyper Agent: boys invent great hero | The・Ultraman: Jackal vs. Ultraman | Kaiju Sakaba Kanpai! | Kaiju Girls | SSSS.GRIDMAN | ULTRAMAN (2019) | Kaiju Step Wandabada | SSSS.DYNAZENON | KAIJU DECODE | GRIDMAN × DYNAZENON
Outlaw Content Space Warriors 2000 | Project Ultraman | Dragon Force: So Long Ultraman | Dragon Force: Rise of Ultraman