How to say "universe" in Japanese

• 宇宙うちゅうJLPT N3approx.Common
  nounCovers the physical universe — the cosmos, and space more generally. Use it when you mean the actual universe we live in, not the world of a story or game.
  宇宙うちゅうには限かぎりはない。↗

  There is no limit to the universe.
• ユニバースCommon
  nounA loanword that appears chiefly in titles, brand names, and borrowed set phrases; when you actually mean the cosmos, 宇宙 is the word to use.
• 世界観せかいかんCommon
  nounThe world or universe of a fictional work — its setting as a whole. Use it for the 'universe' of a story, manga, or game, not for the physical cosmos.

Use 宇宙 for the physical universe or outer space, 世界観 for the universe of a fictional work, and 「ユニバース」 chiefly in titles and borrowed names rather than ordinary talk about the cosmos.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 宇宙うちゅうuniverse
• ユニバースuniverse
• 法界ほっかいuniverse
• 乾坤けんこんheaven and earth
• 母集団ぼしゅうだんpopulation
• 世界観せかいかんsetting (for a fictional work)