How to say "adoption" in Japanese

• 採用さいようJLPT N1approx.Common
  noun, suru verb, transitive verbAdopting a proposal, method, policy, or system and putting it into actual use. It also means hiring new employees, a sense outside 'adoption' proper.
  ６世紀せいきにアングロ・サクソン族ぞくはローマ文字もじを採用さいようした。↗

  In the 6th century, the Anglo-Saxons adopted Roman characters.
• 採択さいたくJLPT N1approx.Common
  noun, suru verb, transitive verbThe formal adoption or selection of one option from among several — a proposal, plan, or application being adopted, typically by a committee or reviewing body.
  その委員会いいんかいはその提案ていあんを採択さいたくした。↗

  The committee adopted the plan.
• 可決かけつJLPT N2approx.Common
  noun, suru verb, transitive verbThe adoption or passage of a motion or bill by vote in an assembly. If 'adoption' refers to a legislature approving a measure, this is the word.
  委員会いいんかいはその議案ぎあんを可決かけつした。↗

  The committee passed the bill.
• 養子縁組ようしえんぐみCommon
  nounThe legal adoption of a person into a family, establishing a parent–child relationship. Whenever 'adoption' concerns people rather than ideas or measures, this is the word you want.
• 摂取せっしゅCommon
  noun, suru verb, transitive verbAbsorption or assimilation of something taken in from outside, such as new knowledge or elements of a foreign culture; here 'adoption' means taking in rather than deciding to adopt.
  後あとに、高校生こうこうせいになると、僕ぼくはビタミン剤びたみんざいを常用じょうようするように化学かがくを「摂取せっしゅした」↗

  Later, in high school, I would take chemistry the way I took vitamin pills.

Use 採用 for putting a proposal or method into use, 採択 for formally adopting one option from several, 可決 for a bill or motion passed by vote, 養子縁組 for adopting a person, and 摂取 for absorbing foreign culture.

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

• 採用さいようuse
• 採択さいたくadoption
• 可決かけつapproval
• 養子縁組ようしえんぐみadoption (of a person)
• 取り上げとりあげadoption
• 襲用しゅうようadoption
• アダプションadoption
• 採納さいのうadoption (e.g. of a proposal)
• アドプトadopting
• 摂取せっしゅabsorption (e.g. of new knowledge)
• 縁組えんぐみadoption