yakuza

Yakuza also known as gokudōare members of traditional organized crime syndicates in Japan. The Japanese police, and Japanese media by request of the police, call them bōryokudan , literally "violence group", while the yakuza call themselves "ninkyō dantai" ( "chivalrous organizations")

Presumed origin	The Kabuki-mono
Creation	17th century
Actual number	86 300 members
Principal clans	Yamaguchi-gumi Sumiyoshi-kai Inagawa-kai Toa-kai Aizukotetsu-kai
Activities	Blackmail, illegal gambling, casinos, murder, prostitution, smuggling