Empress Kōjun
, formerly , is the widow of and fourth daughter of Emperor Shōwa and Empress Kōjun. As such, she is the older sister of Emperor Emeritus Akihito. She married Takamasa Ikeda on 10 October 1952. As a result, she gave up her imperial title and left the Japanese Imperial Family, as required by law. Later, she served as the most sacred priestess ("saishu") of the Ise Grand Shrine between 1988 and 2017.