Where does “宇宙人” come from?

宇宙人 (Japanese) comes from Japanese 人, from Proto-Japonic *pitə — one.

宇宙人 (Japanese): an alien; Synonym of 宇宙飛行士

Definitions

  1. an alien; Synonym of 宇宙飛行士

Ancestry of “宇宙人”, step by step

宇宙人 traces back through two separate lines of ancestry.

via Japanese 人

StepLanguageWordMeaning
1Japanese人a person, human; an individual; mankind, people
2Proto-Japonic*pitəone

via Japanese 宇宙

StepLanguageWordMeaning
1Japanese宇宙the universe; outer space
Every word from Proto-Japonic *pitə →Every word from Japanese 人 →