Translation guide
Information not publicly known, often from an internal source. In Japanese, the expression depends on the nuance: confidential leaks, insider knowledge, or privileged access.
inside information (general)
leaked information
Information secretly passed from within an organization, often to the media or authorities.
General term for internal information. Can be neutral or imply a leak depending on context.
He leaked inside information about the company to a reporter.
Specifically leaked information. Often used in news contexts.
That leaked information is from a reliable source.
Information from a whistleblower or informant, often with a negative connotation of betrayal.
The wrongdoing came to light thanks to inside information from a whistleblower.
Information known only to people within a group, often giving an advantage.
Natural phrase for information from inside a group. Neutral and widely used.
According to inside information, a new product will be released next month.
Information that only insiders know. Emphasizes exclusivity.
Information about the hidden workings or real story behind an event.
Internal state of affairs; the real situation inside an organization. Often used in news or analysis.
The reporter is well-versed in the company's inside information.
Behind-the-scenes or backstage information. Slightly informal, can imply unofficial or secret knowledge.
The phrase 'inside information' does not have a single fixed Japanese equivalent. Using 内側情報 (uchigawa jōhō) sounds unnatural. Choose based on context: leak, insider knowledge, or internal affairs.
Insider information, especially in financial or legal contexts. Often implies trading on non-public knowledge.
Trading using inside information is illegal.
This is inside information that only people involved know, so don't tell anyone else.
He publishes inside information about the entertainment industry on his blog.