Yi Un

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Yi Un
Crown Prince of Korea
Yi Un as a lieutenant of the IJA, 1920s
Head of the House of Yi
Period	24 April 1926 – 1 May 1970
Predecessor	Emperor Sunjong
Successor	Crown Prince Yi Ku
Born	(1897-10-20)20 October 1897 Deoksu Palace, Seoul, Empire of Korea
Died	1 May 1970(1970-05-01) (aged 72) Nakseon Hall, Changdeok Palace, Seoul, South Korea
Burial	Yeongwon Hongneung, Namyangju, Gyeonggi Province, South Korea
Spouse	Princess Masako of Nashimoto of Japan ​ ​ (m. 1920⁠–⁠1970)​
Issue	Prince Yi Jin Crown Prince Yi Ku of Korea
Names Yi Un (이은, 李垠) Posthumous name Crown Prince Uimin (의민황태자, 懿愍皇太子)
House	Yi
Father	Emperor Gojong of Korea
Mother	Imperial Noble Consort Sunheon
Military career
Allegiance	Japan
Service/branch	Imperial Japanese Army
Years of service	1917–1945
Rank	Lieutenant General
Unit	North China Area Army Chosen Army Inspectorate General of Military Training Supreme War Council
Commands held	Imperial Guards 2nd Brigade 51st Division First Air Army
Battles/wars	Second Sino-Japanese War Second World War
Awards	Grand Cordon of the Supreme Order of the Chrysanthemum

Yi Un^[a] (Korean: 이은; 20 October 1897 – 1 May 1970) was the 28th Head of the Korean Imperial House, an Imperial Japanese Army general and the last Imperial Crown Prince of the Korean Empire. Before becoming the heir apparent to Sunjong of Korea, who became the emperor in 1907, Yi Un was known as the title Prince Imperial Yeong (영친왕). In 1910, the Korean Empire was annexed by Japan and Emperor Sunjong was forced to abdicate, and Yi Un married Princess Masako of Nashimoto, the eldest daughter of Prince Nashimoto Morimasa, on 28 April 1920 at Tokyo.

On 10 June 1926, upon the death of Emperor Sunjong, Yi Un received the late emperor's title, and became the King Yi of Changdeokgung (昌徳宮李王), which referred to the palace Changdeokgung. He achieved the rank of Lieutenant General in the Imperial Japanese Army, commanded Japanese forces in China and served as a member of the Supreme War Council. After World War II he was refused entry to Korea, and his Japanese titles were removed by article 14 of the new Constitution of Japan in 1947. After his death in 1970, Yi Un is alternatively known as Crown Prince Uimin (의민태자), a posthumous name given by the Jeonju Lee Royal Family Association.
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