Emperor Jianwen of Jin

Full name
	Family name: Sīmǎ (司馬); Given name: Yu (昱, yù);
Era dates
	Xianan (咸安): 372
Posthumous name
	Emperor Jiǎnwén; 簡文皇帝
Temple name
	Taizōng (太宗)

Emperor Jianwen of Jin
晉簡文帝
Emperor Jianwen of Jin; 晉簡文帝
8th Emperor of the Eastern Jin dynasty
Reign	6 January- 12 September 372
Predecessor	Emperor Fei
Successor	Emperor Xiaowu
Born	320
Died	12 September 372 (aged 51–52); Jiankang, Eastern Jin
Burial	Gaoping ling (高平陵), Nanjing, Jiangsu
Consorts	Empress Jianwenshun; Empress Dowager Xiaowuwen
Issue	Sima Daosheng; Emperor Xiaowu; Sima Daozi; Princess Poyang; Princess Xin'anmin; Princess Wuchang
Full name
Full name
	Family name: Sīmǎ (司馬); Given name: Yu (昱, yù);
Era dates
	Xianan (咸安): 372
Posthumous name
	Emperor Jiǎnwén; 簡文皇帝
Temple name
	Taizōng (太宗)
House	House of Sima
Dynasty	Eastern Jin
Father	Emperor Yuan
Mother	Empress Dowager Jianwenxuan

Emperor Jianwen of Jin (simplified Chinese: 晋简文帝; traditional Chinese: 晉簡文帝; pinyin: Jìn Jiǎnwén Dì; Wade–Giles: Chin Chien-wen-ti; 320 – September 12, 372^[2]), personal name Sima Yu (司馬昱), courtesy name Daowan (道萬), was an emperor of the Eastern Jin dynasty in China. He was the younger brother of Emperor Ming and installed by military leader Huan Wen. Prior to taking the throne, he had served in important roles in the administrations of his grandnephews Emperor Mu, Emperor Ai, and Emperor Fei. Both in his service to his grandnephews and in his own reign as emperor, he is generally viewed as a weak-willed figure who showed enough wisdom to continue to survive and extend Jin rule, but whose effectiveness was also compromised by his over-dedication to philosophical discussions of Taoism and other related philosophies.

^ According to Emperor Jianwen's biography in Book of Jin, he ascended the throne on the jiyou day of the 11th month of the 1st year of the Xian'an era of his reign. This corresponds to 6 Jan 372 on the Julian calendar. (咸安元年冬十一月己酉，即皇帝位。) Jin Shu, vol.09.
^ According to Emperor Jianwen's biography in Book of Jin, he died aged 53 (by East Asian reckoning) on the jiwei day of the 7th month of the 2nd year of the Xian'an era of his reign. This corresponds to 12 Sep 372 on the Julian calendar. ([咸安二年秋七月]己未，立会稽王昌明为皇太子，皇子道子为琅邪王，领会稽内史。是日，帝崩于东堂，时年五十三。) Jin Shu, vol.09. Thus by calculation, his birth year should be 320.

[1] According to Emperor Jianwen's biography in Book of Jin, he ascended the throne on the jiyou day of the 11th month of the 1st year of the Xian'an era of his reign. This corresponds to 6 Jan 372 on the Julian calendar. (咸安元年冬十一月己酉，即皇帝位。) Jin Shu, vol.09.

[2] According to Emperor Jianwen's biography in Book of Jin, he died aged 53 (by East Asian reckoning) on the jiwei day of the 7th month of the 2nd year of the Xian'an era of his reign. This corresponds to 12 Sep 372 on the Julian calendar. ([咸安二年秋七月]己未，立会稽王昌明为皇太子，皇子道子为琅邪王，领会稽内史。是日，帝崩于东堂，时年五十三。) Jin Shu, vol.09. Thus by calculation, his birth year should be 320.

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