Tattooed guests are often refused entry to public baths and swimming pools, and according to the national police agency, 22 organizations are designated as organized crime mafia groups as of 2017, with memberships totaling more than 20,000. Almost three quarters of those gangsters belong to the Yamaguchigumi and two other groups, Sumiyoshikai and Inagwakai, which together dominate the Japan under world. In addition to illegal drugs and sales and gambling, which are their traditional ways of earning money, gangsters have also entered the construction and finance and security businesses