Translation guide
The English word "identifier" refers to something that identifies a person, object, or entity. In Japanese, the translation depends on context: physical IDs, digital usernames, database keys, or abstract markers. This guide covers the most common ways to express this concept naturally.
A physical object like a card, badge, or tag used to prove identity or ownership.
General term for an identification document, such as a driver's license or employee ID card. Often shortened to 身分証 in casual speech.
身分証明書を見せてください。
Please show me your ID.
Loanword for 'ID card'. Common in workplace or event settings.
入館にはIDカードが必要です。
An ID card is required to enter the building.
Literally 'identification tag', used for military dog tags or equipment tags.
A string used to identify a user in a digital system, such as a username, login ID, or handle.
Standard term for 'username' in digital contexts.
ユーザー名とパスワードを入力してください。
Please enter your username and password.
Often used as a standalone term for a login ID or account identifier. Pronounced アイディー.
あなたのIDは何ですか？
What is your ID?
A unique key or code used to identify a record in a database or system.
Technical term for 'identifier' in programming and databases. Often used in compound words like 一意識別子 (unique identifier).
各レコードには一意の識別子が割り当てられます。
Each record is assigned a unique identifier.
In technical contexts, 'ID' is widely used as a loanword for identifiers like user ID, product ID, etc.
商品IDを入力してください。
Please enter the product ID.
Often used for codes that identify items, such as product codes or error codes.
Something that serves to identify a person or thing, like a distinctive feature or symbol.
A marker or landmark used to identify a location or object. Common in everyday speech.
赤い旗が目印です。
The red flag is the identifier.
A distinguishing feature or characteristic that helps identify someone or something.
A specific mark used for identification, like a logo or insignia.
この製品には識別マークが付いています。
This product has an identification mark.
The English word 'identifier' is broad. Using a direct translation like 識別子 for a physical ID card will sound unnatural. Always consider the specific type of identifier.
身分証明書を忘れました。
I forgot my ID.
In many modern contexts, especially digital ones, the English abbreviation 'ID' (アイディー) is perfectly natural and widely understood.
The soldier wore his dog tags around his neck.
Used for online handles or nicknames, especially on forums or social media.
ハンドルネームで呼んでください。
Please call me by my handle.
Error code 404 means 'not found'.
彼の声は独特の特徴がある。
His voice has a distinctive identifier.