yakuza
noun(also Yakuza)
often the yakuza
[singular]a secret organization of criminals in Japan that is similar to the Mafia 類似於黑手黨的日本秘密犯罪組織 The yakuza is involved in gambling and drugs. 黑幫參與賭博和毒品。 The Yakuza has a very complex organizational structure. 山口組的組織結構非常複雜。