noun
close associate of a criminal organization; person who socializes with gangsters
A formal term used in legal, police, or sociological contexts to describe someone who regularly interacts with members of organized crime groups, often implying a degree of complicity or risk.
警察は密接交際者のリストを作成し、暴力団との関係を調査した。
The police compiled a list of close associates and investigated their ties with the yakuza.
If you are regarded as a close associate of a criminal group, it may become difficult to open a bank account.