How to say "vault" in Japanese

• 金庫きんこJLPT N3approx.Common
  nounThe everyday word for a safe, strongbox, or cashbox; choose it when 'vault' means a secure container or room for money and valuables, as in a bank vault.
  貴重品きちょうひんは金庫きんこにしまっておきなさい。↗

  Put your valuables in the safe.
• 吹き抜けふきぬけ
  nounAn architectural term for a space open through two or more floors, such as an atrium or stairwell; it matches 'vault' only in that well-like sense, not the arched-ceiling sense.
• ヴォールト
  nounThe loanword for the architectural sense of 'vault': an arched ceiling or roof of masonry, as seen in Gothic churches; this is the word to reach for when 'vault' means such vaulting.
• 円蓋えんがい
  nounChiefly a dome or cupola; its 'vault' sense is a domed ceiling, so it fits dome-like vaulting rather than the plain arched ceilings better rendered by ヴォールト.
• 保管庫ほかんこ
  nounA room or cabinet for storing things securely; for 'vault' it suits a secure storage space such as a bank vault, where 金庫 would instead suggest a safe or strongbox.

Use 金庫 for a safe or bank vault holding valuables, 「吹き抜け」 for an open well or atrium through a building's floors, 「ヴォールト」 for an arched architectural ceiling, 円蓋 for a domed one, and 保管庫 for a secure storage room.

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

• 金庫きんこsafe
• 吹き抜けふきぬけatrium
• ヴォールトvault
• 円蓋えんがいcupola
• 保管庫ほかんこsafe
• 穹窿きゅうりゅうvault