Empress Kōjun
, born , is a former member of the Imperial House of Japan. She is the fifth and youngest daughter of Emperor Shōwa and Empress Kōjun, and the youngest sister of the Emperor Emeritus of Japan, Akihito. She married Hisanaga Shimazu on 3 March 1960. As a result, she gave up her imperial title and left the Japanese Imperial Family, as required by law.