Our story begins when film producer Tomoyuki Tanaka was forced to scrap the Japanese-Indonesian film titled Eiko no Kanatani (Behind the Glory) during co-production because the Indonesian government refused to grant work visas to the Japanese actors. Now, all he had was a cast, crew, and equipment as well as a schedule. But, he didn't have a movie. In fact, he didn't have even an idea for a film. One day during Tanaka's trip home, he peered outside the window of the traveling airplane staring at the dark waters below wondering what secrets these waves hide. Then it hit him, why not make a film about a gigantic monster?
  The producer hired Shigeru Kayama to write the screenplay for the film, and Eiji Tsuburaya for the special effects in the movie. Tanaka began brainstorming for the film's title which the production crew around the studio nicknamed "G' for 'Giant' project. The concept title was added titled
Kaitei Niman Mairu Kara Dai Kaiju (The Big Monster from 20,000 Miles Underneath the Sea) but the title was dropped because it was too long, was bit of a tongue-twister, and resembled closely to the films The Beast from 20,000 Fathoms (1953) and 20,000 Leagues Under the Sea (1954). Then, one day a friend informed Tanaka about an overweight press agent working in Toho's publicity department. The agent was named 'Gojira' by some of the staff members - Gojira is the combination of the words gorira (gorilla) and kujira (whale). Tanaka loved the name so much, and after considering it for several days, he officially decided to use it for his monster. Thus, Gojira (Godzilla) was born to the entire world.
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Showa series (1954-1975)

Godzilla (Godzilla, King of the Monsters!)
Godzilla Raids Again
King Kong vs. Godzilla
Mothra vs. Godzilla
Ghidorah, the Three-Headed Monster
Invasion of Astro-Monster
Ebirah, Horror of the Deep
Son of Godzilla
Destroy All Monsters
All Monsters Attack
Godzilla vs. Hedorah
Godzilla vs. Gigan
Godzilla vs. Megalon
Godzilla vs. Mechagodzilla
Terror of Mechagodzilla
Heisei series (1984-1995)

The Return of Godzilla (Godzilla 1984)
Godzilla vs. Biollante
Godzilla vs. King Ghidorah
Godzilla vs. Mothra
Godzilla vs. Mechagodzilla II
Godzilla vs. SpaceGodzilla
Godzilla vs. Destoroyah
Shinsei series (1999-2004)

Godzilla 2000: Millennium
Godzilla vs. Megaguirus
Godzilla, Mothra, and King Ghidorah: Giant MonsterAll-Out Attack
Godzilla Against Mechagodzilla
Godzilla: Tokyo S.O.S.
Godzilla: Final Wars
Next-Gen series (2008-20??)

Godzilla 3D to the MAX
Untitled Next-Gen Godzilla film [2013]
Related Toho films

Rodan (1956)
The Mysterians (1957)
Varan the Unbelievable (1958)
Battle in Outer Space (1959)
Mothra (1961)
Gorath (1962)
Matango (1963)
Atragon (1963)
Dogora, the Space Monster (1964)
Frankenstein Conquers the World (1965)
Space Amoeba (1970)
War of the Gargantuas (1966)
King Kong Escapes (1967)
Zone Fighter (1973, TV series)
The War in Space (1977)
Rebirth of Mothra (1996)
Rebirth of Mothra II (1997)
Rebirth of Mothra III (1998)
Guilala's Counterattack: The Touyaku Summit One-Shot Crisis (2008)
King Kong films

King Kong (1933)
The Son of Kong (1933)
King Kong (1976)
King Kong Lives (1986)
King Kong (2005)
Gamera films

Gamera
Gamera vs. Barugon
Gamera vs. Gyaos
Gamera vs. Viras
Gamera vs. Guiron
Gamera vs. Jiger
Gamera vs. Zigra
Gamera: Super Monster
Gamera: Guardian of the Universe
Gamera 2: Attack of Legion
Gamera 3: Awakening of Irys
Gamera the Brave
The Beast from 20,000 Fathoms (USA, 1953)
Behemoth, the Sea Monster (USA/UK, 1959)
Gorgo (UK, 1961)
Reptilcus (Denmark/USA, 1961)
Yonggary (South Korea, 1966)
Gappa the Triphibian Monster (Japan, 1967)
Reptilian (South Korea, 1999)
The Host (South Korea, 2006)
D-War (South Korea, 2007)
Cloverfield (USA, 2008)
The Host 2 (South Korea, 2009)
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