In the real world
- Tomoyuki Tanaka, a producer at Toho Studios, developed an idea for a movie about a giant monster created by an H-bomb test that attacks Japan.
- 1 March: The United States tests its first dry fuel H-bomb, Castle Bravo, at the Bikini Atoll in the Marshall Islands. Having not been given adequate warning by the Americans regarding the fallout radius, a Japanese fishing boat called the Daigo Fukuryū Maru (Lucky Dragon No. 5) sailed nearby and was hit by the fallout, eventually resulting in the death of the ship's radioman. Most fish caught around Japan for the next few months were contaminated by drifting fallout and could not be eaten, causing a severe downfall in the fishing industry.
- 7 May: Wataru Mimura is born.
- 1 July: The Japanese Self-Defense Forces are established.
- Science Adventure Picture Story: Godzilla, a manga adaptation of the upcoming film Godzilla, is published in the October issue of Omoshiro Book.
- 25 October: Monster Godzilla, a novelization of Godzilla authored by the film's storywriter Shigeru Kayama, is published by Iwatani Shoten.
- 3 November: The first Godzilla film is released in Japan.
- 25 November: Monster Godzilla, a manga adaptation of Godzilla, is published by Reimeisha.
- 22 December: Daiei release The Beast from 20,000 Fathoms theatrically in Japan, under the title The Atomic Monster Appears.
- 29 December: The film Invisible Man is released in Japan.
- Godzilla, a giant 50-meter kaiju created by the radioactivity from an H-bomb test, attacks Japan and completely destroys the country's capital city of Tokyo. The beast is finally killed by the Oxygen Destroyer, a device invented by Daisuke Serizawa. The doctor, however, sacrificed himself and died with the King of the Monsters in order to insure that his device would never be used again. (Godzilla)
- On Lagos Island, three man-made animals called Dorats are exposed to a nuclear blast and merge into one, giant monster: King Ghidorah. (Godzilla vs. King Ghidorah)
- Monarch, overseen by General Douglas MacArthur, is authorized unofficially in order to expand understanding of so-called Massive Unidentified Terrestrial Organisms. (Godzilla: King of the Monsters)
- In March, the two Shinomura fuse into one and attack Moansta Island. The Moansta Islanders contact Ishiro Serizawa's father, who contacts Monarch and Godzilla battles it and uses his atomic breath on it, splitting Shinomura into two. Godzilla kills one of the halves, but the other escapes and Godzilla goes after it. The U.S. Army decides to intercept and try to kill them at Bikini Atoll. The Castle Bravo nuclear "test" is conducted, killing the Shinomura. Godzilla, however, survived. (Godzilla: Awakening / Godzilla)
3 Nov. - Godzilla (1954) theatrical release poster
22 Dec. - Japanese The Atomic Monster Appears poster
29 Dec. - Invisible Man theatrical poster
This is a list of references for 1954. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: 
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