Godzilla vs. Megalon (昆虫怪獣メガロ対ゴジラ 海底王国全滅作戦,   Konchū Kaijū Megaro tai Gojira Kaitei Ōkoku Zenmetsu Sakusen?, lit. The Insect Monster Megalon Against Godzilla; The Undersea Kingdom's Annihilation Strategy) is a 1973 tokusatsu kaiju film produced by Toho Company Ltd., and the thirteenth installment in the Godzilla series as well as the Showa series. The film was released to Japanese theaters on March 17, 1973.


The underground civilization Seatopia has been heavily affected by nuclear testing conducted by the surface nations of the world. The nation's people, the Seatopians, watch in horror as a nuclear test conducted near the Aleutian Islands critically damages Monster Island. Godzilla, Rodan and Anguirus had been resting on the island when a huge fissure generated by the test ripped the idyll in two. As Godzilla called out for his friends, Rodan and Anguirus fell down the growing chasm. The earthquake generated by the test that destroyed Monster Island also left the capital city of Seatopia in ruins. Naturally upset by this, they unleash their civilization's protector, Megalon, to the surface to destroy those who would — unknowingly or not — destroy them.

The ground opens to reveal Megalon, who goes on a rampage outside of Tokyo. Meanwhile, two Seatopian Agents attempt to steal the newly constructed super-robot Jet Jaguar, which can be used to guide and direct Megalon. They also capture the robot's inventor, Goro Ibuki, his kid brother Rokuro and their friend Hiroshi Jinkawa. One of the Agents stays with Jinkawa and directs Jet Jaguar towards Megalon. The other agent takes Rokuro and Goro into a cargo container and bribes a pair of truckers to dump the container in the lake. Things get out of hand, though, and the Seatopian agent is thrown from the truck after threatining the two truckers with a pistol. Soon afterward, Jinkawa, Goro and Rokuro are reunited and try and convince the Military into using Jet Jaguar to re-direct Megalon, who is attacking Tokyo.

Goro manages to regain control using his hand-held voice-command devise, and sends Jet Jaguar to Monster Island to bring Godzilla back to fight Megalon. An extended fight scene then takes place, with Godzilla and Jet Jaguar, the latter newly giant-sized and self-directed, fighting Megalon in a generic small field. The Seatopians, however, summon Gigan to aid Megalon. The film ends with Megalon and Gigan (who for the second time abandons an ally) defeated, Godzilla returning to Monster Island, and Jet Jaguar returning to his previous, human-sized state, reuniting with Goro, Rokuro and Jinkawa.


Staff role on the left, staff member's name on the right.

  • Directed by Jun Fukuda
  • Written by Jun Fukuda, Takeshi Kimura, Shinichi Sekizawa
  • Produced by Tomoyuki Tanaka
  • Music by Riichiro Manabe, Masato Shimon
  • Cinematography by Yuzuru Aizawa
  • Edited by Michiko Ikeda
  • Production design by Yoshifumi Honda
  • Assistant directing by Tsunesaburo Nishikawa
  • Special effects by Teruyoshi Nakano


Actor's name on the left, character played on the right.




  • Type 66 Maser Cannon (Stock Footage)



Godzilla vs. Megalon was originally planned as a non-Godzilla film, but instead a film for Jet Jaguar, which was the result of a contest Toho had for children in mid-to-late 1972. The winner of the contest was an elementary school student, who submitted the drawing of a robot called "Red Alone," which superficially resembled both Ultraman and Mazinger Z. The robot was renamed Jet Jaguar and was set to star in Jet Jaguar vs. Megalon, which pitted him against Megalon. However, after doing some screen tests and storyboards, Toho figured Jet Jaguar would not be able to carry the film on his own, either in screen appearance or marketing value, so they shut the project down during pre-production. Nearly a month later, producer Tomoyuki Tanaka called in screenwriter Shinichi Sekizawa to revise the script to add Godzilla and Gigan. To make up for lost production time, the film was shot in a hasty three weeks. The production time totaled at nearly six months, from planning to finish.

Alternate titles

  • Gorgo and Superman Meet in Tokyo (Gorgo y Superman se citan en Tokio; Spain)
  • Planetary Titans (Titanes planetarios; Mexico)
  • Godzilla 1980 (Godzilla 1980; France; French Belgium)
  • King Kong: Demons from Outer Space (King Kong — Dämonen aus dem Weltall; Germany)
  • At the Borders of Reality (Ai confini della realtà; Italy)

Theatrical releases

  • Japan - March 17, 1973
  • United States - April 1976
  • Portugal - November 17, 1973
  • Germany - December 14, 1973
  • Spain - December 1974
  • October 27, 1976

Television releases

  • South Korea - June 14, 1973

U.S. release

American Godzilla vs. Megalon poster

In 1976, CinemaShares released a dubbed version of Godzilla vs. Megalon theatrically. Riding the coattails of Dino De Laurentiis' big-budget King Kong remake, poster art showed Godzilla and Megalon battling on top of the World Trade Center, despite the fact that no scenes were set in New York.

To obtain a G-rating from the MPAA, CinemaShares cut three minutes of footage, including:

  • The opening credits.
  • Rokuro being abducted by Seatopian agents, who pull him into their car.
  • Scenes in the container truck that showed pornographic material on the back wall (There was more dialogue in the scenes that added to the story, thus making these cut scenes somewhat confusing).
  • A fight scene between Hiroshi and the lead Seatopian agent.
  • A scene of the bearded Caucasian Seatopian agent being thrown down a cliff by the truck drivers.
  • Some scenes of bloody violence, when the toy jet (which Rokuro borrowed from the hobby shop) flies into the lead Seatopian agent's face, there was a brief shot of blood dripping from his face and when Hiroshi says "Get him!!!", Rokuro swings on the chained picture boxes in Goro's lab, and strikes the agent above the chest.
  • The Seatopian agent being crushed by a boulder hurled by Megalon.
  • Dialogue: "What the hell was that?" and "Damn you!"

With this being the second of the three CinemaShares Godzilla releases, the publicity factor was high. Along with the poster, buttons with one of the four kaiju's faces on them were released. A couple of weeks before the release of Godzilla vs. Megalon, CinemaShares had a comic book released to promote the film, but in the comic there are numerous errors present in the monster's names and locations and events. The theatrical trailer for the film also contain these errors, such as Jet Jaguar being called "Robotman."

Box office

When Godzilla vs. Megalon was released on March 17, 1973 in Japan, it only sold 980,000 tickets, making it the first Godzilla film to sell less than a million tickets.


Godzilla vs. Megalon was released theatrically in America in April of 1976, though the San Francisco Chronicle indicates that it opened there in June, and The New York Times indicates that it opened in New York City on July 11. Oddly, New York Times film critic, Vincent Canby, who a decade before had given a negative review to Ghidorah, the Three-Headed Monster-- one of the more respected entries in the Godzilla series-- gave Godzilla vs. Megalon a generally positive review.

In his review of July 12, 1976, Canby says "m" completes the canonization of Godzilla... It's been a remarkable transformation of character-- the dragon has become St. George... It's wildly preposterous, imaginative and funny (often intentionally). It demonstrates the rewards of friendship, between humans as well as monsters, and it is gentle."

Canby was one of the few critics who enjoyed the film however, as it held a "rotten" 38% on Rotten Tomatoes, based on 16 reviews.

Godzilla vs. Megalon was given a high-profile prime-time network premiere the next year, with an introduction and bumper segments by John Belushi in a Godzilla suit.

Godzilla vs. Megalon has attracted the ire of many Godzilla and kaiju fans in the decades since its original release. The film is largely responsible for the reputation of Godzilla films in the United States as cheap children's entertainment that should not be taken seriously. It's been described as "incredibly, undeniably, mind-numbingly bad" and one of the "poorer moments" in the history of kaiju films.

In particular, the special effects of the film have been heavily criticized. One review described the Godzilla costume as appearing to be "crossed with Kermit the Frog" and another stated that sneeringly compared it to Godzilla vs. Gigan, stating that it did "everything wrong that Gigan did, and then some." However, most of the criticism is of the lack of actual special effects work, as most of it consists of stock footage from previous films, including Godzilla vs. Gigan and Ghidorah, the Three-Headed Monster, and at least one piece of effects work has garnered praise, specifically a scene where Megalon breaks through a dam.

The other aspects of the film have been similarly skewered. The acting is usually described as flat and generally poor, and as not improving, or sometimes, worsening, the already weak script. One part of the film, on the other hand, has garnered almost universal praise: Godzilla's final attack on Megalon, a flying kick. It has been called the saving grace of the film, and was made famous by the mock exclamations of shock and awe displayed on Godzilla vs. Megalon's appearance on Mystery Science Theater 3000. The episode is available on volume ten of the Mystery Science Theater 3000 DVD series, which has become rare because the DVD was discontinued due to rights issues with the Godzilla franchise, and the collection was released shortly afterward with The Giant Gila Monster instead of Godzilla vs. Megalon.

Despite all this, the film is also one of the most widely seen Godzilla films in the United States—it was popular in its initial theatrical release, largely due to an aggressive marketing campaign, including elaborate posters of the two title monsters battling atop New York City's World Trade Center towers. These posters in particular have been greeted with some embarrassment by fans. Also, several unauthorized VHS tapes have been released in the early 90s, making it the Godzilla movie with the boots to some fans.

Home media releases

Alpha Video (2001)

  • Unlicensed
  • Released: 2001
  • Region: Region 1

Passion Products (2002)

  • Unlicensed
  • Released: 2002
  • Region: Region 1

Age Video (2003)

  • Unlicensed
  • Released: 2003
  • Region: Region 1

Toho (2004)

  • Released: 2004
  • Region: Region 2
  • Language: Japanese

Madman (2006)

  • Released: 2006
  • Region: Region 4

Tokyo Shock (2012)

  • Released: 2012
  • Region: Region 1
  • Languages: Japanese and English


  • According to the DVD commentary for this film by Steve Ryfle and Stuart Galbraith IV, the nuclear detonation at the beginning of the film may be a reference to Cannikin, which is a code name for the testing of a five megaton hydrogen bomb test conducted on the island of Amchitka in the Aleutian Island chain of Alaska on November 6, 1971. It was said to be the largest underground nuclear test in U.S. history.
  • Godzilla vs. Megalon took only three weeks to film. Despite this, Toho had enough money and materials available to build four new suits, including a new suit to replace the aging and increasingly damaged Godzilla suit that had been in use for over five years by the time of the film's release, suggesting that a lack of money and resources wasn't the main reason for the film's quick production.
  • There are no female characters in this entire film, except for the Seatopian dancers.
  • Godzilla vs. Megalon received some of the strangest retitles in foreign releases for Godzilla films, including "Gorgo y Superman se citan en Tokio," literally meaning "Gorgo and Superman Meet in Tokyo" for the Spanish release, and "King Kong - Dämonen aus dem Weltall", literally meaning "King Kong - Demons From Outer Space" for the German release.
  • For the German release of this film, Jet Jaguar was renamed to "King Kong." However, there is no connection to the real King Kong beyond his name, and in contrary to a widespread misconception, he is not said to be a giant ape wearing a robot suit in the dub.
  • According to production stills, in one scene, where Godzilla was meant to beat Gigan and Megalon with a tree, he was going to have a telephone pole in his mouth.
  • When Megalon attacks fighter jets that are firing at him, stock footage of Gigan's claws from the previous film are used.
  • The scene where Megalon attacks Tokyo is almost entirely done with stock footage. The only original shots that weren't taken from Ghidorah, the Three-Headed Monster are close-up shots of Megalon.


Film media
Godzilla films
King Kong films
Mothra films
Gamera films
Other films
Cancelled or scrapped films