How to say "basement" in Japanese

• 地下室ちかしつCommon
  nounThe common everyday word for a basement or cellar: an underground room in a house or building, such as the space where a household stores things or keeps a workshop.
  地下室ちかしつは汚きたなくて、暗くらくて、臭においの。↗

  The cellar is ugly, dark, and stinky.
• ベースメント
  nounA straightforward loanword from English. It is less common than 地下室, which is usually the word you want for a basement, so this is rarely the necessary choice.
• 地階ちかい
  nounRefers to the basement level or storey of a building rather than an individual room; it is less common, and 地下室 is the usual choice for an underground room or cellar.
  家いえの地階ちかいに問題もんだいがあるようだ。↗

  The basements of the houses are likely to have problems.

Choose 地下室 for an underground room or cellar in a house or building; 地階 names the basement level of a building; 「ベースメント」 is a less common loanword for which 地下室 usually works instead.

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

• 地下室ちかしつcellar
• ベースメントbasement
• 地階ちかいbasement