(かせいじん)

かせいじん
noun
Martian; inhabitant of Mars
1. Martian; inhabitant of Mars
A fictional or hypothetical being from the planet Mars. Used in science fiction and popular culture, and sometimes figuratively to describe someone who seems completely out of touch or alien.
その映画(えいが)には火星人(かせいじん)登場(とうじょう)する。
Martians appear in that movie.
()どもの(ころ)火星人(かせいじん)本当(ほんとう)にいると(しん)じてい��。
When I was a child, I believed Martians really existed.
あの(ひと)(かんが)(かた)はまるで火星人(かせいじん)みたいで、(だれ)理解(りかい)できない。
That person's way of thinking is like a Martian's — nobody can understand it.

Composed of 火星(かせい) (Mars, the planet) and (じん) (person). Follows the productive pattern of planet name + (じん) to form hypothetical alien inhabitants: 金星人(きんせいじん) (Venusian), 木星人(もくせいじん) (Jovian), etc.

COMMON COLLOCATIONS:

  • 火星人(かせいじん)襲来(しゅうらい): Martian invasion
  • 火星人(かせいじん)みたい: like a Martian (figurative: alien, incomprehensible)
  • 火星人(かせいじん)()めてくる: Martians are attacking

CULTURAL CONTEXT:
The concept of 火星人(かせいじん) became widespread through H.G. Wells' "The War of the Worlds" (1898), which was translated into Japanese. The classic image of a Martian with a large head and tentacles (タコ(がた)火星人(かせいじん), "octopus-type Martian") remains a staple of Japanese pop culture and manga.

RELATED TERMS:

  • 宇宙人(うちゅうじん): alien; extraterrestrial — the general term for any being from space
  • 地球外生命体(ちきゅうがいせいめいたい): extraterrestrial life — formal/scientific