Boryokudan is a term used in Japan to refer to organized crime groups, commonly known as the Yakuza. These groups are involved in various illegal activities, including drug trafficking, extortion, and gambling. The Yakuza has a complex structure and often operates under a code of conduct, emphasizing loyalty and respect among members. The Boryokudan is recognized for its distinct tattoos and rituals, which symbolize commitment and identity. While they are often portrayed negatively in media, some members engage in community activities and charitable work. The Japanese government continues to combat their influence through legislation and law enforcement efforts.