Oyabun

Yakuza

"Yakuza" written in katakana
Founded	17th century (presumed to have originated from the Kabukimono)
Membership	102,560 members
Criminal activities	Criminal activities and/or illegitimate businesses
Notable members	Principal clans Yamaguchi-gumi Sumiyoshi-kai Inagawa-kai

Principal clans

Yakuza (ヤクザ^?, [jaꜜkuza]), also known as gokudō (極道^?), are members of transnational organized crime syndicates originating in Japan. The Japanese police, and media by request of the police, call them bōryokudan (暴力団^?, "violent groups"), while the yakuza call themselves "ninkyō dantai" (任侠団体 or 仁侠団体^?, "chivalrous organizations"). The yakuza are notorious for their strict codes of conduct and organized fiefdom-nature. They have a large presence in the Japanese media and operate internationally with an estimated 102,000 members.

Despite uncertainty about the single origin of yakuza organizations, most modern yakuza derive from two classifications which emerged in the mid-Edo period (1603–1868): tekiya, those who primarily peddled illicit, stolen or shoddy goods; and bakuto, those who were involved in or participated in gambling.