noun
Federal Bureau of Investigation; FBI
Official Japanese name for the US Federal Bureau of Investigation. Used in news, formal contexts, and official documents.
連邦捜査局が事件の捜査を開始した。
The FBI has begun investigating the case.
FBI is the English abbreviation commonly used in Japanese media alongside 連邦捜査局. 連邦捜査局 is the formal Japanese translation.
Compound of 連邦 (federation) + 捜査 (investigation) + 局 (bureau), a direct translation of 'Federal Bureau of Investigation'.