The Japanese underworld, often associated with the Yakuza, is a complex network of organized crime groups in Japan. These groups engage in various illegal activities, including drug trafficking, extortion, and gambling. The Yakuza is known for its strict codes of conduct and rituals, which often include elaborate tattoos that signify membership and rank. Despite their criminal activities, the Yakuza has a unique relationship with Japanese society. They sometimes provide services in areas where the government is absent, such as disaster relief. However, law enforcement has increasingly cracked down on these organizations, leading to a decline in their influence in recent years.