context: The long history of the Yakuza began sometime in 1612, when the Tokugawa Shogun came to power and got rid of the previous Kasai shoguns. This change resulted in the approximately 500,000 samurai who were previously called hatomo-yakko (shogun servants) became lost masters, or referred to as the ronin.
question: When did the Yakuza start appearing in Japan?
answers.text: 1612