They are films in which the Asian mafia is of great importance in the plot. The Yakuza (Japanese mafia) and the Triad (Chinese mafia) are organized crime organizations or syndicates dedicated to criminal activities such as drug trafficking, murder, gambling, extortion, etc.; they also have connections with construction, entertainment and sports companies.
The Yakuza arose during the "Edo" period in early 17th century Japan, after ending the civil war in 1604, which put 500,000 samurai out of work. Most of the samurai became teachers, philosophers and merchants, but those who failed to adapt to the new times began to engage in criminal activities instead.
These organizations are reputed to have a high sense of loyalty and honor, and have some acceptance in Japanese society, even doing charitable deeds such as sending aid when natural disasters occur and keeping unorganized crime at a low level.
Once used as punishment, tattoos are now a very popular art form among yakuza in Japan.
The Triad is based primarily in mainland China, Hong Kong, Macau, and Taiwan. It has its origins in the 18th century and emerged as a resistance group to overthrow the Ming Dynasty. They were previously known as the "Union of the Three Harmonies" which refers to the harmony between heaven, earth and man.
After the Communist Party took power in China in 1949, the Triads in mainland China moved their main operations to Hong Kong.
Triad gang crimes include charging protection fees, drug dealing, money laundering, illegal gambling, smuggling, human trafficking, etc. Individual members also commit crimes such as theft, fraud, kidnapping, and intimidation.
While triads are developing locally, they have also gradually spread in the United States, France, Canada, and other countries.