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Gojira tai Hedora (1971)

From Earth's pollution a new monster is spawned. Hedorah, the smog monster, destroys Japan and fights Godzilla while spewing his poisonous gas to further the damage.



, (as Kaoru Mabuchi)

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Cast overview, first billed only:
Akira Yamauchi ...
Toshie Yano
Hiroyuki Kawase ...
Toshio Shiba ...
Keiko Mari ...
Yoshio Yoshida ...
Gohei - a fisherman
Haruo Suzuki ...
JSDF Officer
Yoshio Katsube ...
JSDF Engineer
Susumu Okabe ...
Announcer A
Kentaro Watanabe ...
Announcer B
Wataru Ômae ...
Police Officer
Tadashi Okabe ...
Shigeo Katô
Takuya Yuki ...
Eisaburo Komatsu ...
Non Commissioned Officer


A pollution monster named Hedorah comes from outer space. First it terrorizes sea, then it goes on land where it encounters the big G. After it's after the fight with Godzilla it retreats, only to reappear again in a flying form, it's starts to kill people. Then it takes on it's final form, that's when the Big G comes and the battle that decides the fate of the world begins. Written by Spaceroach

Plot Summary | Add Synopsis


Creature of Slime and Sludge Spawned by Pollution's Poison Threatens to Destroy the Earth! See more »

Motion Picture Rating (MPAA)

Rated PG for sci-fi monster violence and brief mild language | See all certifications »

Parents Guide:





Release Date:

February 1972 (USA)  »

Also Known As:

Godzilla vs. the Smog Monster  »


Box Office


$250,000 (estimated)
See more on IMDbPro »

Company Credits

Production Co:

Show more on  »

Technical Specs


Sound Mix:


Aspect Ratio:

2.35 : 1
See  »

Did You Know?


For the first time, the American International Pictures (AIP) dub of the movie translated its theme song, "Bring Back Nature". The English song, re-titled "Save the Earth", was performed by then-upcoming singer Adryan Russ. Russ claims that for a long time she had considered her involvement with a Godzilla movie an embarrassments, but upon learning of the movie's cult status, she completely changed her mind. The other official English dubbing track for the film, produced by Toho, keeps the song in Japanese. See more »


When Hedorah throws some sludge at Godzilla's eye in the Mt. Fuji scene, it hit's Godzilla right eye, but after Hedorah gets done laughing, Godzilla's left eye is the one that is damaged. See more »


Dr. Yano: It probably came from a sticky, dark planet far, far away. Now go to sleep.
See more »

Crazy Credits

In AIP's American version of the film, the entire cast is mysteriously uncredited. See more »


Referenced in Eleventh Hour: Subway (2009) See more »


Kaese! Taiyô wo
("Return! The Sun")
Main Title Theme
Music by Riichirô Manabe
Lyrics by Yoshimitsu Banno
Sung by Keiko Mari, the Honey Knights and the Moon Drops
See more »

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User Reviews

Craziest movie ever!
22 November 2001 | by See all my reviews

Something spooky is happening on the Japanese coast; pollution is killing the fish in the ocean, but it also gives life to a monstrous mutated fish-monster. A professor and his genius kid watch it's destructions on TV, and the kid remarks: "- Oh, that was a tadpole-monster." Japan and the entire world is soon threatened by the unearthly Creature, who's named Hedorah by the Professors kid.

At the same time a funky teenage assistant of the professor gets drunk at an absurdly psychadellic disco and has visions of all the party-people being mutated fish. Hedorah inhales polluted smoke from factory- chimneys and seem to get high, the kid is psychic and has visions of Godzilla coming to save the world, and the Professor is attacked by the Hedorah underwater and his face gets malformed. Godzilla and the "Smog Monster" (as it is sometimes referred to as) start fighting only 25 minutes into the movie. The Hedorah mutates from ocean- dweller, to reptile to flying creature, and experts conclude that "He" is probably from a distant Nebula in outer space. Scenes of havoc and the Professor's family is intercut with cartoon- style sequences with strong enviromental messages.

One scene has the Hedorah flying over a group of people working out, and they turn blue-faced and ultimately into gushy skeletons. A man at a construction site screams out (extremely) loud, and then falls to his death. Hedorah has the ability to corrode metal, and people on TV quarrel intensely on the fate of the planet. The Professors assistant knows the end is near, and has a hippie-styled party on top of a mountain; "- Let's have fun as we die!!" The party is interrupted by the space/pollution freak, and most of the kids are melted by its poisonous vomit/droppings when they try to set it on fire.

The Professor's kid has found the solution to defeat the grotesque beast: "- Dry it - it's only sludge!", and with the aid of the friendly Godzilla it finally works. Some scenes, as well as the sounds the Hedorah makes are beyond description; like the scene were it's covering Godzilla with its tons of toxic puke, and at the same time "laughing" diabolically. There are weird crosscutting throughout, the kid yells "Papa" alot and the groovy rock score helps to its remarkably insane mood. The PG- rating should be reconsidered. This one is too dark and demented in so many ways, I don't think a ten year- old should watch it. It's mad nightmarish, art-cinematic style could cause damage.

A TV- reporter calls the Hedorah "a freak organizm" - much like this movie itself.

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