How to say "accepted" in Japanese

• 既成きせいCommon
  no-adjectiveCovers 'accepted' in the sense of already established and taken as given, as with accepted ideas, conventions, or facts. It describes pre-existing things, not the act of accepting an offer or request.
• れっきとした
  expression, prenominal modifierHere 'accepted' means recognized as legitimate and respectable: something fully-fledged and beyond question, like a respectable company or a clear, undeniable reason. Less common, and usually written in kana.
  新聞しんぶんに書かかれていることはれっきとした事実じじつである。↗

  What is reported in the paper is an obvious fact.
• 了解済みりょうかいずみ
  no-adjectiveA business expression meaning a request or proposal has been understood and accepted; the nuance is acknowledgment — the matter has been received and taken care of. Less common.
  明日あす会合かいごうがあるということは了解りょうかい済ずみだ。↗

  It is accepted that we'll have a meeting tomorrow.
• 了承済みりょうしょうずみ
  no-adjectiveAlso used in business, but it frames acceptance as agreement: a plan or proposal has been acknowledged and agreed to, so consent is on record. Less common.
  明日あす会合かいごうがあるということは了承りょうしょう済ずみだ。↗

  It is accepted that we'll have a meeting tomorrow.

Use 既成 for what is already established and accepted as given, 「れっきとした」 for what is accepted as legitimate and respectable, and 「了解済み」 or 「了承済み」 for accepting a request or proposal in business, the latter stressing agreement.

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

• 既成きせいestablished
• れっきとしたaccepted
• 了解済みりょうかいずみaccepted
• 了承済みりょうしょうずみacknowledged