Sanada Masayuki was a prominent Japanese samurai and military commander during the late Sengoku period. He was born in 1544 and is best known for his strategic prowess and loyalty to the Sanada clan. Masayuki played a significant role in various battles, including the famous Siege of Osaka. Masayuki was the father of Sanada Yukimura, another notable samurai known for his bravery. He served under the powerful warlord Toyotomi Hideyoshi and later aligned with the Tokugawa shogunate. His legacy is celebrated in Japanese history, particularly for his tactical skills and contributions to the unification of Japan.