The film was released direct to video in the United States in November 25, 1992 by HBO Video.
In 1984, a scientific team picks through the ruins of Tokyo, searching for tissue samples left behind by Godzilla. U.S. troops working for the genetic engineering company Bio-Major attempt to escape with a sample, but they are dispatched by a lone mercenary who steals the sample. Meanwhile, in the Middle East, researcher Genshiro Shiragami looks forward to returning to Japan with his daughter, Erika. However, a terrorist bombing destroys his research facility and kills Erika.
Five years later, Shiragami is now a haunted man studying the psychic energy of roses. Psychic Miki Saegusa, who heads an institution for intuitive children, aids him in his research. Two groups are watching Shiragami: a gang of thieves hired by Bio-Major and an assassin from a Middle Eastern country called Saradia. As it turns out, Shiragami is involved in the study of Godzilla cells. It is believed by Shiragami's employers that he is aiding them in figuring out how to utilize the cells' properties to create "Anti-Nuclear Energy Bacteria", radiation-devouring bacteria meant to be used as a fatal weapon against Godzilla. When the thieves and the assassin catch each other breaking into Shiragami's lab, a gunfight ensues. A giant, mobile plant kills one of the thieves. His partner flees, and the assassin barely escapes from the plant's grasp. They do not realize that they have just encountered the result of Shiragami's secret experimentations. The next morning, the giant flower is seen in a nearby lake, and Shiragami confesses that he combined the DNA of roses with some extracted from Godzilla's cells. He also confesses that he had, in a fit of grief-driven madness, added Erika's DNA to the genetic composite, so that technically, the creature is partially human as well. He names his creation "Biollante".
Godzilla finally reaches Biollante. A huge battle ensues, and briefly it appears that there is a stalemate. However, Godzilla defeats Biollante with his atomic breath, seemingly destroyed her. However, they find out that Biollante is the immortal monster as Godzilla continues on. Godzilla, running low on radioactive energy after the previous battles, heads towards the nearest operational nuclear reactor in Tsuruga. The military is sent out to meet Godzilla at Ise Bay. Godzilla instead surfaces in Osaka Bay, avoiding a confrontation with the JSDF. Saegusa tries to help, attempting to make Godzilla turn away from Osaka. Her efforts distract Godzilla momentarily, but the force of Godzilla's will and his psychic brainpower overwhelms her and causes her to faint. A plan is put into action involving infecting Godzilla with the regained Anti-Nuclear Energy Bacteria. In its final battle, the Super X II is destroyed by Godzilla after luring it into Osaka's business district. Colonel Gondo and his soldiers use rocket launchers equipped with the bacteria. The operation is initially successful, despite the death of Lieutenant Gondo, with bacteria injected into Godzilla into three points in his body. Godzilla is seemingly unaffected by it, and continues on.
Godzilla is dying and therefore will be unable to escape when the terrorist tries to get the cell. Kirishima chases the agent and fights him. The agent is at a disadvantage until he is able to grab his weapon again and attempts to kill Kirishima. However, Colonel Koruki disintegrates the terrorist. The characters celebrate their victory when Godzilla returns from the sea waters. The body of Shiragami is placed inside a tent, with his superior briefly mourning him before leaving. Erika's voice is heard to comment on the events of the film. Godzilla wades out to sea and Biollante, once again a giant rose, orbits Earth.
- Kunihiko Mitamura as Kazuhito Kirishima
- Yoshiko Tanaka as Asuka Okouchi
- Masanobu Takashima as Colonel Sho Kuroki
- Megumi Odaka as Miki Saegusa
- Koji Takahashi as Doctor Genichiro Shiragami
- Toru Minegishi as Lt. Goro Gondo
- Toshiyuki Nagashima as Director Seiichi Yamamoto
- Ryunosuke Kaneda as Seido Okouchi
- Kazuma Matsubara as Super X II Coordinator
- Yasunori Yuge as Prime Minister
- Yoshiko Kuga as Owada, Prime Minister's Wife
- Yasuko Sawaguchi as Erika Shiragami
- Brien Uhl as SSS9
- Koichi Ueda as General Hyodo
- Kosuke Toyohara as Super X II Controller
- Kurt Cramer as John Lee, Bio-Major Spy
- Derrick Homes as Michael Low, Bio-Major Spy
- Demon Kakka as Himself
- Abdallah Helal as Saradian Scientist
- Manjot Beoi as Saradian Plant Director
- Kenpachiro Satsuma as Godzilla
Godzilla vs. Biollante began as a winner of a contest by Toho. The concept was created by Shinichiro Kobayashi, a dentist. His script was widely different from the final film, the few parts that remained were Erika's death, Biollante's creation, a psychic girl, and for the most part, the ending. This first draft also had Dr. Shiragami first create a rat/fish hybrid monster named Deutalios who was quickly killed by Godzilla. This was cut and replaced by Godzilla's battles with Biollante's rose stage and the Super X II. In another ending, Biollante begins to lose and makes a final attempt to kill Godzilla by turning into a wave of pure energy which Godzilla would absorb. There was another ending of the film where Biollante dies and the hill sides suddenly exploded into bloom with millions of roses.
After the film was released in Japan, Toho commissioned a Hong Kong company called Omni Productions to dub the film into English. This international version of the film was released on video in the United States by HBO Video in 1992. The film was released on laserdisc the next year. Godzilla vs. Biollante was released on DVD and Blu-Ray disc in America by Echo Bridge Entertainment through Miramax on December 4, 2012.
In Early 1990, Toho entered discussions with Miramax to distribute the film. When talks broke off, Toho filed a lawsuit in Los Angeles Federal Court, accusing Miramax of entering an oral agreement in June to pay Toho $500,000 to distribute the film. This lawsuit delayed the film's release for two years. An out of court settlement was reached with Miramax buying the rights to the film for an unreported figure. While Miramax had entertained thoughts of releasing the film in theaters, but in the end it was decided to release the film straight to home video instead. HBO released the film on VHS in 1992 and Laserdisc in 1993. Miramax utilized the uncut English international version of the film for this release.
In Japan, the film sold approximately 2 million tickets, earning $7,000,000 (U.S).
Godzilla vs. Biollante has received generally positive reviews. Ed Godziszewski of Monster Zero said the film is "by no means a classic" but felt that "for the first time in well over 20 years, a [Godzilla] script is presented with some fresh, original ideas and themes." Joseph Savitski of Beyond Hollywood said the film's music is "a major detraction", but added that it's "not only one of the most imaginative films in the series, but also the most enjoyable to watch." Japan Hero said, "This is definitely a Godzilla movie not to be missed."
In the 1996 film Mars Attacks! a scene from this film is seen by the Martians.
Dr. Shiragami re-appears in the 2007 video game Godzilla: Unleashed. He accidentally creates a new Biollante while attempting to weaponize an alien crystal. Later, he reveals the secrets of the crystals & "Critical Mass".
Biollante appears in the Super Nintendo games Super Godzilla (1993) and Godzilla: Monster War (1994).
Echo Bridge Home Entertainment/Miramax - Blu-ray A (Region Free) America
Picture Format: 1.85:1 (1080p 24fps) [AVC MPEG-4]
Soundtrack(s): Japanese DTS-HD Master Audio 5.1 Japanese Dolby Digital 2.0 Stereo English Dolby Digital 1.0 Mono
Subtitles: English (translation of screen text), English (for Japanese audio), English HoH (for English audio)
Extras: Making of Godzilla vs. Biollante" Documentary (49:17)
Behind the Design" Featurette (2:58)
Notes: All extras are in SD and case incorrectly states the DTS-HD Master Audio 5.1 track as DTS 5.1.
Other Releasing: Mega-Monster Movies Blu-ray (Set[s]) Contains: Mega Shark Vs Giant Octopus / Monster (Also in DVD/Blu-Ray Combo)