How to say "certification" in Japanese

Choosing the right word
  • 認証にんしょうCommon
    noun, suru verb, transitive verbCovers certification in the sense of officially verifying that someone or something is genuine or qualified, and also authentication, as with credentials or identity. The usual choice for formal certification of persons, products, or systems.
    管理人かんりにんによってアカウントの認証にんしょうが行おこなわれたあと、あなたに確認かくにんのメールが送おくられます。↗
    You will receive a confirmation email after your account has been activated by an administrator.
  • 公認こうにんJLPT N1approx.Common
    suru verb, transitive verb, no-adjectiveCertification as official recognition or authorization by an authoritative body, emphasizing that something is publicly endorsed rather than merely verified. Fits contexts where an organization officially approves or sanctions someone or something.
  • 確かめたしかめCommon
    nounReally the act of confirming or checking something oneself, and only marginally a way to say certification. Seldom the word you want for formal certification; use it when the meaning is simply making sure of something.
  • 証明しょうめいJLPT N3approx.Common
    noun, suru verb, transitive verbCovers certification in the sense of proving or demonstrating that something is true, as in verification or evidence. Choose it when the emphasis is on establishing proof rather than on an official credential being granted.
    私が間違まちがっていない事ことを証明しょうめいしよう。↗
    I'll show you that I am right.
  • 認定にんていCommon
    noun, suru verb, transitive verbCertification as an authoritative body's determination that someone or something meets requirements, close in nuance to official acknowledgment or authorization. Often the right word when a qualification or status is formally conferred.
    米べい消費者しょうひしゃ団体だんたいがRealPlayerを「バッドウェア」と認定にんてい。↗
    American consumer group identifies RealPlayer as 'badware'.

For credential-type certification use 認証 or 認定, for official approval use 公認, for proving something true use 証明, and for the plain act of checking or confirming use 「確かめ」.

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

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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