Invasion of the Neptune Men (宇宙快速船, Uchū Kaisokusen[3])[a] is a 1961 superhero film produced by Toei Company Ltd.

Invasion of the Neptune Men is part of Japan's tokusatsu genre, which involves science fiction and/or superhero films that feature heavy use of special effects.

The low-quality special effects, the non-existent acting, the bad dubbing, and the chaotic plotting and pacing were all of a piece with what critics had been saying, erroneously, about the Godzilla movies for years.

[11] Eder described the episode as a memorable one, specifically the cast watching the repetitive aerial dogfights between spaceships, and the line "Independence Day seems a richly nuanced movie".

[9] Other moments included the observation of excessive use of World War II stock footage in the action scenes (notably during a shot featuring a picture of Adolf Hitler in a building),[12][13] a "Who's On First?