Azai Nagamasa (1545 - August 28, 1573) was a famous daimyo of the Sengoku period in Japan, and the adoptive father of Toyotomi Hideyoshi. Originally a retainer of the Asai clan in Echizen Province, he became the adoptive father of Hideyoshi after the clan's defeat in the Battle of Kawanakajima. Nagamasa played a crucial role in Hideyoshi's rise to power.
