How to say "execution" in Japanese

• 実行じっこうJLPT N3approx.Common
  noun, suru verb, transitive verbExecution as actually doing something: carrying out a plan or putting an idea into practice. When English 'execution' means getting a planned task done, this is the word you want.
  私は彼かれの実行じっこう的てき能力のうりょくを信頼しんらいしている。↗

  I trust his executive ability.
• 執行しっこうCommon
  noun, suru verb, transitive verbExecution in the formal, often legal sense: enforcement — carrying out an official decision, order, or duty. Use this rather than 実行 when 'execution' means putting an authoritative decision into effect.
  裁判所さいばんしょが法律ほうりつを執行しっこうする。↗

  The courts administer the law.
• 処刑しょけいCommon
  noun, suru verb, transitive verbExecution of a person: putting someone to death as punishment. This is the word for capital execution in stories, history, and news; it never means executing a plan or a contract.
  チャールズ１世せいは断頭台だんとうだいで処刑しょけいされた。↗

  Charles I had his head cut off.
• 出来できCommon
  nounExecution as the quality of how well something is done: workmanship, craftsmanship, finish. Use it when appraising a finished piece of work rather than for executing plans or documents.
  全般的ぜんぱんてきにみてまあまあの出来できだった。↗

  He hasn't done badly, all in all.
• 締結ていけつCommon
  noun, suru verb, transitive verb, intransitive verbExecution only in the narrow sense of formally concluding a contract or entering into a treaty. Outside contract and treaty language it is not the word for 'execution' at all.
  幾多いくたの紆余うよ曲折きょくせつを経へて条約じょうやくは締結ていけつされるに至いたった。↗

  The treaty has been concluded after many twists and turns.

Use 実行 for carrying out plans, 執行 for formal enforcement of official decisions, 処刑 for putting a person to death, 出来 for the quality of workmanship, and 締結 for formally concluding contracts.

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

• 実行じっこうexecution (e.g. of a plan)
• 執行しっこうexecution
• 処刑しょけいexecution
• 出来できworkmanship
• 締結ていけつconclusion
• 遂行すいこうaccomplishment
• 施工せこうconstruction
• 履行りこうperformance (of a duty)
• 営みいとなみactivity
• 断行だんこうdecisive action
• 刑死けいしexecution
• 死刑執行しけいしっこうexecution
• 上意討ちじょういうちexecution (on the command of a feudal lord)
• 刑戮けいりくpunishment
• 整えととのえpreparation
• 行法ぎょうほうcarrying out of rules
• 強制執行きょうせいしっこう(compulsory) execution
• 施行しこうcarrying out (a plan, policy, etc.)
• 出来栄えできばえworkmanship
• 手際てぎわperformance