Tadanaga Shimazu (?-?), also called Tadatake Shimazu, was the cousin, general, and karo (advisor) of Yoshihiro Shimazu and the Shimazu clan. He was adopted into the Imaizumi Shimazu, and eventually became daimyo of that branch, and his daughter Atsu Shimazu would be the wife of Iesada Tokugawa. Tadanaga fought in the campaigns of his cousin and was also a commander of the Western Army in the Sekigahara Campaign.