Empress Kōjun

, born , was a member of the Imperial House of Japan, the wife of Emperor Shōwa (Hirohito) and the mother of Emperor Emeritus Akihito.
Her posthumous name is "Kōjun" (香淳), which means "fragrant purity". 
Empress Kōjun was empress consort (皇后 "kōgō") from 25 December 1926 to 7 January 1989, making her the longest-serving empress consort in Japanese history.