裏うら社しゃ会かい

noun

underworld; underside of society

Refers to the hidden, often criminal side of society, including organized crime, black markets, and other illicit activities.

• 彼かれは裏うら社しゃ会かいとのつながりを疑うたがわれている。

  He is suspected of having connections with the underworld.

• 裏うら社しゃ会かいの人にん間げんは、表おもての顔かおと裏うらの顔かおを使つかい分わける。

  People in the underworld maintain a public face and a hidden face.