Directed by	Koji Shima
Produced by	Masaichi Nagata
Written by	Gentaro Nakajima (novel) Hideo Oguni (screenplay) Jay Cipes (English dialogue) Edward Palmer (English dialogue)
Starring	Keizo Kawasaki Toyomi Karita Bin Yagasawa Shozo Nanbu Bontarô Miyake Mieko Nagai Kiyoko Hirai Isao Yamagata
Music by	Seitaro Omori
Cinematography	Kimio Watanabe
Editing by	Toyo Suzuki
Running time	88 min. (US version)
Language	Japanese

Warning from Space or Mysterious Satellite (Uchūjin Tokyo ni arawaru? Spacemen Appear in Tokyo) is a 1956 science fiction tokusatsu film produced by Daiei, and the first Japanese science-fiction film produced in color. The plot of the American English-dubbed version is somewhat similar to Toho's later Gorath (Yosei Gorasu) (1962), depicting a planet — "Planet 'R'" — on a collision course with Earth. Warning from Space has one-eyed, starfish-shaped aliens from the planet Paira who take on human forms to warn the earth about the impending disaster. In contrast to the usual anti-nuclear message of the Japanese science-fiction film genre, Warning from Space seemingly takes the position that nuclear weapons can be put to good use, as a means to prevent the collision with Planet 'R.'

The Pairan aliens were designed by prominent avant-garde artist, Taro Okamoto. Walt Lee reports that Gentaro Nakajima's novel, on which this film was based, was in turn based on the Japanese folktale Kaguya-hime. However, it is difficult to see much connection between the film and the folktale.

Produced during the science-fiction boom following in the wake of the success of Toho's Godzilla (1954), Daiei had hoped to find a foreign market for Warning from Space. The film played at the King Cinema in Rangoon in January 1958, earning 11,846 kyat during its first week. However Daiei was unable to find an international distributor for the film until American International purchased it for U.S. TV about 1965.

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