Translation guide
The Federal Bureau of Investigation, a U.S. federal law enforcement agency. In Japanese, it is almost always referred to by its English abbreviation, pronounced in katakana.
Referring to the agency itself, its agents, or its activities.
The English abbreviation is used directly in Japanese, written in Latin alphabet or sometimes in katakana as エフビーアイ. It is understood by most Japanese speakers.
彼はFBIの捜査官です。
He is an FBI agent.
FBIがその事件を捜査している。
The FBI is investigating the case.
In Japanese, 'FBI' is pronounced as individual letters: エフ (Efu), ビー (Bī), アイ (Ai). It is not read as a word.
In Japanese text, 'FBI' is usually written in Latin alphabet (FBI) or sometimes in katakana (エフビーアイ). The full Japanese name 連邦捜査局 is rarely used outside formal contexts.
The official Japanese translation of 'Federal Bureau of Investigation'. Used in formal or official contexts, such as news reports or government documents. Less common in everyday conversation.
連邦捜査局（FBI）が声明を発表した。
The Federal Bureau of Investigation (FBI) issued a statement.