yakuza
noun(also Yakuza)
often the yakuza
[singular]a secret organization of criminals in Japan that is similar to the Mafia 类似于黑手党的日本秘密犯罪组织 The yakuza is involved in gambling and drugs. 黑帮参与赌博和毒品。 The Yakuza has a very complex organizational structure. 山口组的组织结构非常复杂。