is a 1967 Japanese kaiju film directed by Haruyasu Noguchi. The film is about a group of Japanese reporters who discover an infant monster called a Gappa on Obelisk Island. The reporters cage the creature and take it to Japan where it becomes a media attraction. This angers the natives of the island and Gappa's full-grown parents, who head toward Japan to find their child. Its plot virtually duplicates that of the 1961 British film Gorgo.

The film was released theatrically as Daikyojū Gappa in Japan in 1967, but only received a direct-to-television release in the United States as Monster from a Prehistoric Planet. It received positive reviews from Variety and Phil Hardy.

Gappa: The Triphibian Monster

Certain shots of the Gappas attacking Japan were used in the 1991 Red Dwarf episode "Meltdown".

Gappa: The Triphibian Monster

Plot

An expedition from Tokyo heads to Obelisk Island, which the greedy Mr. Funazu, owner of Playmate Magazine, wants to turn into a resort. The island natives welcome the expedition, but two members, Hiroshi and Itoko, venture into a forbidden area despite the pleas of a native boy named Saki. They enter a cavern blocked by a fallen statue and find a giant egg, out of which hatches a baby "bird-lizard" monster, referred to as "Gappa". The natives plead with the skeptical scientists not to take the baby away, lest it anger the baby's parents, but they do so anyway. Inside the caverns, Gappa's two parents rise from the subterranean waters beneath the volcano, destroying everything in their path. Saki, the only survivor, is rescued by an American Navy fleet and brought to Japan.

Gappa: The Triphibian Monster

Meanwhile, Gappa makes global headlines and is experimented on by scientists. To the shock of the expedition members, two giant flying creatures appear over Sagami Bay. The Gappa parents ravage cities looking for their offspring and prove impervious to military weapons. Hiroshi, Itoko, Saki, and expedition scientist Professor Tonooka try to persuade the headstrong Mr. Funazu to let the baby go and return it to its parents. Mr. Funazu finally lets Gappa go back to its parents. Then the three go back to Obelisk Island.

Cast

Tamio Kawachi as Hiroshi Kurosaki

Yoko Yamamoto as Itoko Koyanagi

Yuji Okada as Daize Tonoka

Kōji Wada as Mashida

Tatsuya Fuji as George Inoue

Keisuke Inoue as Mr. Funazu, Magazine owner

Zenji Yamada as Captain of the Kamome-Maru

Bumon Koto as Chief of Obelisk Island

Kôtarô Sugie as Reporter #1

Saburô Hiromatsu as Hosoda

Binnosuke Nagao as Commander Riku

Masaru Kamiyama as Professor

Kokan Katsura as Saburo Hayashi

Shirô Oshimi as Oyama

Yoko Oyagi as Aihara

Sanpei Mine as Islander #1

Takashi Koshiba as Reporter #2

Kensuke Tamai as Islander #2

Minoru Sato as Reporter #3

Kiyoshi Matsuoka as Islander #3

Hiroshi Itoh as Reporter #4

Mike Danine as Petty Officer

Ruich Fidancer as Captain of the Sea Angels

Paul Scheman as Professor McDonald

Hiroshita Atami and Takashi Konagaias as Gappa (male) Ken Misugi and Shiro Tonami as Gappa (female)

Production

Writing

The year 1967 was the height of Japan's “Kaiju Boom” and many Japanese film studios were doing their own monster film. Nikkatsu jumped onboard and decided to do their own film. Several ideas were hatched but not bore fruit. there was Giant Monster Gigant (大怪獣ギガント, Daikaiju Giganto): A giant alien lifeform resembling a spider arrives on Earth and causes destruction. Giant Squid Monster Arkitius (大烏賊アーキティウス, Oiki Akitiusu): During World War II, a Nazi U-boat is attacked by a giant squid called Arkitius. Giant Monster Momonra (怪獣モモンラ, Daikaiju Momonra): Japan is attacked by a giant mutated flying squirrel. And Reigon: Devil of the Seabed (海底の魔王レイゴン, Kaitei no mao Reigon): A giant manta ray dubbed “Reigon” appears one day and wreaks havoc across the world and then fights a giant iguana. This was the fourth and final unmade film in a series of concepts Nikkatsu Company had before making Gappa. This concept got the furthest into development out of the four scrapped projects, receiving a plot synopsis, speculative screenplay, and kaiju ideas. Planning was done by Hideo Kodama; the draft was written by Shunichi Yukimuro and Ryuzo Nakanishi.

Filming

In an interview with the film's screenplay writers, Gen Yamazaki and Ryuzo Nakanishi, they explained that the film got government financing of about 500,000,000 yen (about $1.4 million), which was ten times the average of a Nikkatsu film. Eisei Koi, who was the producer of the film was classmates with politicians in the Diet and used his political power to get the money.