How to say "completion" in Japanese

• 完成かんせいJLPT N3approx.Common
  noun, suru verb, transitive verb, intransitive verbThe general word for something — a work, project or building — being finished; it can also suggest perfection, a thing brought to its final, polished state.
  新あたらしい鉄道てつどうはまだ完成かんせいしていない。↗

  The new railway is not completed yet.
• 完了かんりょうJLPT N3approx.Common
  noun, suru verb, transitive verb, intransitive verbThe completion of a task, process or procedure — the sense of something having been concluded; this is the word you meet in business and technical contexts when an operation or job is finished.
  屋根やねが破損はそんした家いえは今いまでは修理しゅうりが完了かんりょうしている。↗

  The house with the damaged roof has been repaired.
• 卒業そつぎょうJLPT N4approx.Common
  noun, suru verb, intransitive verbPrimarily 'graduation': it covers 'completion' only in the sense of finishing a course of study at a school. For completion in any other sense, this is not the word you want.
  彼かれは学校がっこうを卒業そつぎょうしたあと、ロンドンへ行いった。↗

  After he left school, he went to London.
• 出来上がりできあがりJLPT N2approx.Common
  nounThe finished state of something made — how a dish or piece of craftwork has turned out; it points to the result rather than to the act of completing it.
• 修了しゅうりょうJLPT N1approx.Common
  noun, suru verb, transitive verb, intransitive verbThe term for the completion of a course or program of study. When 'completion' means finishing a course rather than finishing things in general, this is the word to reach for.
  私は高校こうこうの全ぜん課程かていを修了しゅうりょうした。↗

  I completed the whole high school curriculum.

Use 完成 for a work or project being finished, 完了 for a task or process concluding, 「出来上がり」 for how something made has turned out, and 卒業 or 修了 when completion means finishing a course of study.

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

• 完成かんせいcompletion
• 完了かんりょうcompletion
• 卒業そつぎょうgraduation
• 出来上がりできあがりcompletion
• 修了しゅうりょうcompletion (of a course)
• 仕上がりしあがりfinish
• 完結かんけつconclusion
• 補完ほかんcomplementation
• 履修りしゅうtaking (a class)
• 大成たいせいcompletion
• 落成らくせいcompletion (of a building)
• 完遂かんすいsuccessful execution
• 了りょうfinish
• 成就じょうじゅfulfillment
• 完了ワンラend
• コンプcompletion (of a collection, video game, etc.)
• 結了けつりょうcompletion
• コンプリーションcompletion
• 充備じゅうびcompletion
• 竣成しゅんせいcompletion
• パスコンプリートcompletion
• 全クリぜんクリcompletion (of a game)
• 出来しゅったいcompletion
• あがりcompletion
• 打ち上げうちあげend (of a project, theatrical run, etc.)
• 成立せいりつconclusion (e.g. of a deal)
• 消化しょうかconsumption
• コンプリートcompletion (of a collection, video game, etc.)
• 完かんcompletion
• まとまりsettlement
• アップfinishing