(March 6, 1903 - June 16, 2000) was an empress consort of Japan. Born , she was the consort of Emperor Shōwa and the mother of the present Emperor (Akihito). Her posthumous name, Kōjun, means "fragrant purity".
Empress Kōjun was empress consort (kōgō) from 25 December 1926 to 7 January 1989, making her the longest lived empress consort in Japanese history.
Princess Nagako was born on 6 March 1903 in Tokyo, the eldest daughter of Prince Kuni Kuniyoshi (1873 - 1929), by his wife, Chikako (1879 - 1956), the 7th daughter of Prince Shimazu Tadayoshi, former lord of Satsuma, 29th and last daimyo of the line. Prince Kuniyoshi Kuni, a son of Prince Kuni Asahiko, was the head of one eleven cadet branches of the Imperial Family during the Meiji and Taishō periods. Princess Nagako attended the Girls' Department of Peers' School in Tokyo (now Gakushuin) with her first cousin, Princess Masako Nashimoto, who became Crown Princess Bangja of Korea.
The daughters who lived to adulthood, left the Imperial family as a result of the American reforms of the Japanese Imperial Household in October 1947 (in the case of Princess Teru) or under the terms of the 1947 Imperial Household Law at the moment of their subsequent marriages (in the cases of Princesses Yori, Taka, and Suga). In both cases, since they married men who were or who would become commoners, they lost their titles of Princess as well as their Imperial status.
Although she performed her ceremonial duties as Empress in a traditional way and attended special ceremonies such as those for the 2600th anniversary of the legendary foundation of the Empire of Japan in 1940 or the conquest of Singapore in 1942 , the Empress was the first Japanese Imperial Consort to travel abroad. She accompanied Emperor Shōwa on his European tour in 1971 and later on his State Visit to the United States in 1975. She became known as the "smiling Empress".
After the Emperor's death on 7 January 1989, she assumed the title of Empress Dowager. At that time, she was in failing health herself and did not attend her husband's funeral. Her last public appearance was in 1988. She was in seclusion for the rest of her life.
At the time of her death at the age of 97 in 2000, she had been an empress for 74 years. Emperor Akihito granted his mother the posthumous title of Empress Kōjun. Her final resting place is in a mausoleum near that of her husband, Hirohito.