Osaka Castle is a historic Japanese castle located in Chūō-ku, Osaka, known for its impressive architecture and significant role during the Sengoku period. Originally built in the late 16th century by Toyotomi Hideyoshi, the castle served as a symbol of his power and ambition to unify Japan. Its strategic location and design made it a key fortification during the turbulent warring states era, reflecting the authority and influence of daimyōs as they competed for control over territories.