Translation guide
The process of verifying identity or validity. In Japanese, the translation depends on context: logging in, verifying documents, or confirming authenticity.
Verifying a user's identity to access a system, app, or device.
The standard technical term for authentication in IT contexts. Used for user login, biometrics, two-factor, etc.
二要素認証を設定してください。
Please set up two-factor authentication.
指紋認証でログインできます。
You can log in with fingerprint authentication.
Literally 'identity verification'. Often used for online identity checks (eKYC) or when opening accounts.
口座開設には本人確認が必要です。
Identity authentication is required to open an account.
While technically 'login', it's often used in everyday speech to mean the authentication step.
パスワードでログインしてください。
Please authenticate with your password.
Confirming that a document, certificate, or signature is genuine.
Also used for official certification of documents, like notarization or apostille.
この書類は公証人によって認証されています。
This document has been authenticated by a notary public.
Means 'certification' or 'proof'. Often used in contexts like proving authenticity of a document.
Formal phrase meaning 'verification of authenticity'. Used in legal or archival contexts.
文書の真正性の確認が求められます。
Authentication of the document's authenticity is required.
Verifying that an artwork, antique, or luxury item is genuine, not a forgery.
Expert appraisal or authentication of art, antiques, etc.
この絵画は専門家によって鑑定されました。
This painting was authenticated by an expert.
Literally 'genuine/fake judgment'. Used in art and antique authentication.
真贋判定には時間がかかります。
Authentication takes time.
Means 'genuine article'. In casual contexts, saying something is '本物' implies it has been authenticated.
認証 (authentication) is about verifying identity. 承認 (approval) is about granting permission. Don't confuse them.
ログインには認証が必要です。
Login requires authentication.
申請には上司の承認が必要です。
The application requires the boss's approval.
In casual situations like showing ID at a store, 認証 sounds overly technical. Use 本人確認 or simply 確認.
年齢確認のために身分証を見せてください。
Please show ID for age verification.
本人であることの証明が必要です。
You need authentication of your identity.
これは本物だと証明されました。
This was authenticated as genuine.