How to say "architecture" in Japanese

• 建築けんちくJLPT N3approx.Common
  noun, suru verb, transitive verbThe usual word for architecture in the sense of buildings and their design or construction, as in discussing styles, architects, or the building industry.
  彼かれらは家いえの建築けんちくにとりかかった。↗

  They set about building a house.
• アーキテクチャCommon
  nounA loanword for architecture in technical senses, especially the design or structure of computer hardware, software, or other systems; this is the word you want in IT contexts.
  あの社しゃの新あたらしいコンピューターはアーキテクチャーに問題もんだいがあって回収かいしゅう騒さわぎになっているんだってさ。↗

  There was a problem with the architecture of that company's new computer. They're going through a recall frenzy right now.
• 建築学けんちくがくCommon
  nounArchitecture as an academic field of study — the discipline taught and researched at universities. Use it for the subject, not for actual buildings or for system design.
• 構築こうちくCommon
  noun, suru verb, transitive verbMatches 'architecture' only in the sense of constructing or putting together systems or agreements; it names the act of building rather than an architecture itself, so it is seldom the word you want for the noun.
  我々われわれは他人たにんとの関係かんけいを構築こうちくし、維持いじしていく。↗

  We build and maintain relationships with others.
• 体系たいけいJLPT N2approx.Common
  noun, noun (suffix)Matches 'architecture' when it means a coherent overall framework or organization of ideas, rules, or knowledge; for buildings or computer design it is not the right word.
  彼かれらはその体系たいけいを大変たいへんな思索しさくと労力ろうりょくを費ついやして仕上しあげた。↗

  They worked out the system with much thought and labor.

Use 建築 for buildings and building design, 建築学 for the academic discipline, 「アーキテクチャ」 for system/computer architectures, 構築 for the act of building systems, and 体系 for an overall framework or organization.

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

• 建築けんちくconstruction
• アーキテクチャarchitecture
• 建築学けんちくがくarchitecture
• 構築こうちくconstruction
• 体系たいけいsystem
• 結構けっこうstructure