Daigo Fukuryū Maru
On March 1, 1954, just a few months before the film was made, the Japanese fishing vessel "Daigo Fukuryū Maru" ("Lucky Dragon No. 5")had been showered with radioactive fallout from the U.S. military's 15-megaton "Castle Bravo" hydrogen bomb test at nearby Bikini Atoll. The boat's catch was contaminated, spurring a panic in Japan about the safety of eating fish, and the crew was sickened, with one crew member eventually dying from radiation sickness. This event led to the emergence of a large and enduring anti-nuclear movement that gathered 30 million signatures on an anti-nuclear petition by August 1955 and eventually became institutionalized as the Japan Council against Atomic and Hydrogen Bombs. The film's opening scene of Godzilla destroying a Japanese vessel is a direct reference to these events, and had a strong impact on Japanese viewers with this recent event still fresh in the mind of the public.