How to say "infrastructure" in Japanese

• インフラCommon
  nounThe shortened form of インフラストラクチャー and the usual way to say 'infrastructure': roads, utilities, transport and communications networks, in news reports, business, and daily conversation.
• インフラストラクチャーCommon
  nounThe full-length loanword, meaning exactly the same as インフラ; the abbreviation is what you will normally see and hear, so this longer form can come across as heavy or deliberate.
• 基盤きばんJLPT N2approx.Common
  nounReally means 'base' or 'foundation': the underlying support on which an economy, industry, or society rests. It fits 'infrastructure' only in that abstract sense, not for roads, utilities, and other concrete facilities.
  ２１世紀せいきは経済力けいざいりょくを基盤きばんとするようになるだろう。↗

  The 21st century is going to be based on economic power.

Use 「インフラ」, or its full form 「インフラストラクチャー」, for infrastructure as systems and facilities such as roads, utilities, and networks; use 基盤 when you mean the underlying foundation or base supporting an economy, society, or activity.

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

• インフラinfrastructure
• インフラストラクチャーinfrastructure
• 基盤きばんbase
• 基礎構造きそこうぞうinfrastructure