Translation guide
The English word 'informer' refers to someone who provides information, often to authorities, about others' activities. In Japanese, the translation depends heavily on context: whether the person is a police informant, a whistleblower, a spy, or simply someone who tells on others. This guide covers the most common and natural ways to express these nuances.
A person who secretly gives information to the police or authorities about criminal activities, often in exchange for money or leniency.
The police arrested the criminal thanks to an informer.
Literally 'secret informer'. Carries a negative connotation of betrayal or snitching. Often used in criminal underworld contexts.
Can sound like 'snitch' or 'rat'. Use with care as it implies disloyalty.
He cooperated with the police as an informer for the organization.
Slang for a tipster or informant, often used in media or police jargon. 'タレコミ' means 'tip-off'.
The weekly magazine reporter bought information from an informer.
A person who exposes wrongdoing within an organization, often at personal risk, for the public good.
Standard term for 'whistleblower'. Refers to someone who reports illegal or unethical practices from inside an organization.
The whistleblower exposed the company's misconduct.
Shorter form meaning 'accuser' or 'whistleblower'. Can be used in legal or general contexts.
The informer submitted evidence.
A person who secretly collects information for a government or organization, often in espionage contexts.
A person who tells on someone for minor misdeeds, often in everyday situations like school or work.
Colloquial term for a tattletale or snitch. 'チクリ' is onomatopoeic for a sharp sting, implying a sneaky report.
That kid is a tattletale who tells the teacher right away.
Also used in casual contexts for 'snitch', but can sound overly dramatic. See caution in police meaning.
May sound too strong for minor tattling; use チクリ屋 for lighter nuance.
He was called a snitch.
情報提供者 is a neutral 'information provider', often used by police. 密告者 implies secret betrayal and is negative. 内部告発者 is specifically a whistleblower exposing organizational wrongdoing, often seen as heroic.
Directly translating 'informer' as インフォーマー is not natural in Japanese. Use the context-appropriate terms above.
The informer provided important classified information.