How to say "mafia" in Japanese

• マフィアCommon
  nounThe criminal-organization sense: the Mafia itself. This is the word you want in most contexts — news reports on organized crime, gangster films, or discussion of mob activity.
  マフィアは隠かくれみのに合法的ごうほうてきな事業じぎょうを展開てんかいしている。↗

  The Mafia uses legitimate business operations as a front.
• 人狼じんろう
  nounNot a word for gangsters: it means werewolf and names the social deduction game that English speakers call Mafia. It fits 'mafia' only when discussing that party game, and it is the less common word.

Use 「マフィア」 for the criminal organization; 人狼 means werewolf and names the social deduction game known in English as Mafia, so it suits only that game sense and is the less common word.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• マフィアMafia
• 人狼じんろうWerewolf (social deduction game)