Ninja was a covert agent or mercenary in feudal Japan. The functions of a ninja included espionage, deception, and surprise attack. Their covert methods of waging irregular warfare were deemed dishonorable and beneath the honor of the samurai. Though shinobi proper, as specially trained spies and mercenaries, appeared in the 15th century during the Sengoku period (15th–17th centuries), antecedents may have existed as early as the 12th century.The grand daddy of the FamiLane Collection, this premium T-shirt is as close to perfect as can be. It’s optimized for all types of print and will quickly become you favorite T-shirt. Soft and comfortable, durable and thick, this is a definite must-own and a FamiLane recommended product.