ID

ID is the abbreviation for Identification, pronounced アイディー in Japanese. It commonly refers to usernames, account identifiers, or identification numbers.

Compounds

• 社員(しゃいん)ID (employee ID)
• 会員(かいいん)ID (member ID)
• ユーザーID (user ID)
• 学生(がくせい)ID (student ID)
• IDカード (ID card)

Digital usage

• ログインID (login ID)
• Apple ID, Google ID (service-specific IDs)
• ID認証(にんしょう) (ID verification)

Physical id

For physical identification documents, 身分証明書(みぶんしょうめいしょ) is the native term, though IDカード is also used.

Id payment

In Japan, "iD" (stylized) is also a major contactless payment service by NTTドコモ, which can cause confusion with the general term.

Register: Neutral. Standard vocabulary in digital and business contexts.