Aboard the station, a group of starfish-like beings called Pairan discuss how to warn humans of an impending disaster, deciding on contacting Japanese scientist Dr. Kumara.

Shortly afterwards, as the team of scientists discuss her abnormal traits, the camouflaged Ginko appears and reveals her true identity, explaining she is from Paira, a world on the same orbit as Earth but on the opposite side of the Sun.

They send a formal letter to the World Congress, which treats their communication with silent contempt (Japanese: mokusatsu).

Only after they show Planet R and its rapid acceleration in the telescope does the World Congress launch its nuclear weapons, which ineffectively explode on its surface.

In the meantime, a group of spies have abducted Matsuda and are attempting to steal his formula to the nuclear device the disguised Pairan warned him about.

The scientists then all watch as the nuclear device is shot from the space station and destroys Planet R, cooling the atmosphere and removing the threat.

[note 1][15][16][14] The Japanese title of Warning from Space bears the term "appear" (現わる, arawaru); it had been repeatedly used by Daiei Film at that time including The Invisible Man Appears,[note 2] and the Japanese title of The Beast from 20,000 Fathoms, which later influenced the production of Gamera, the Giant Monster.

[18] Daiei also hoped to find a foreign market for Warning from Space, though the company found difficulty in selling it.

[19] Nevertheless, the film played at both King Cinema in Rangoon, Burma[20] and Tai Khoon Theatre in Sandakan, Malaysia, in 1958.

After release, the film was met with negative reviews, with critics calling it "bizarre" and accusing it of using science fiction clichés.

[30] Gyan Prakash, in his book Noir Urbanisms: Dystopic Images of the Modern City, called the film "charming.

[31] In his biography of Stanley Kubrick, author John Baxter traces Kubrick's interest in science fiction films, which led to his 2001: A Space Odyssey, to the Japanese kaiju films of the 1950s, including Warning from Space, with its "nameless two-metre-tall black starfish with a single central eye, who walk en pointe like ballet dancers.

"[11] Baxter notes that despite their "clumsy model sequences, the films were often well-photographed in colour... and their dismal dialogue was delivered in well-designed and well-lit sets.

[14] The Pairans' asteroidean appearance is similar to that of a later pentagrammic creations; Starro, a villain from DC Comics' Justice League,[38][39] and the Decarabia in the Megami Tensei franchise.