, also known as Heijō-tennō, was the 51st emperor of Japan,Emperor Heizei, Yamamomo Imperial Mausoleum, Imperial Household Agency according to the traditional order of succession.Ponsonby-Fane, Richard. (1959). The Imperial House of Japan, pp. 62–63. Heizei's reign lasted from 806 to 809.Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 96–97; Brown, Delmer et al. (1979). Gukanshō, pp. 279–280; Varley, H. Paul. Jinnō Shōtōki, p. 151.

Traditional narrative Heizei was the eldest son of the Emperor Kanmu and empress Fujiwara no Otomuro.Varley, p. 151; Brown, p. 279. Heizei had three empresses and seven sons and daughters.Brown, p. 279.

Heizei is traditionally venerated at his tomb; the Imperial Household Agency designates , in Nara, as the location of Heizei's mausoleum. The site is publicly accessible.Nara City Sightseeing Information Center (Narashikanko): Heizei's misasagi, map Although one of the largest kofun monuments in Japan, archaeological investigations in 1962–1963 indicate that it was constructed in the early 5th century, and that portions of it were destroyed during the construction of Heijō-kyō, calling into question the designation by the Imperial Household Agency.

Events of Heizei's life Before he ascended to the throne, his liaison with Fujiwara no Kusuko, the mother of his one consort, caused a scandal. Because of this scandal his father considered depriving him of the rank of crown prince.

785: (): Heizei was appointed Crown Prince at the age of 12.Brown and Ishida, p. 279 April 9, 806 Julian dates derived from NengoCalc (): In the 25th year of Emperor Kanmu's reign, he died; and despite an ensuing dispute over who should follow him as sovereign, contemporary scholars then construed that the succession (senso) was received by his son. Shortly thereafter, Emperor Heizei is said to have acceded to the throne (sokui).Titsingh, p. 95; Brown and Ishida, p. 279; Varley, p. 44; a distinct act of senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Emperor Go-Murakami.

His title Heizei was derived from the official name of the capital in Nara, Heizei Kyō.

During Heizei's reign, the bodyguards were reorganized; the existing Imperial Bodyguards became the Left Imperial Bodyguards, while the Middle Bodyguards became the Right Imperial Bodyguards.Brown and Ishida, p. 280 Both sides were given a new Senior Commander; at this time Heizei appointed Sakanoue no Tamuramaro (758–811) as Senior Commander of the Imperial Bodyguards of the Right. Under Emperor Kanmu, Tamuramaro had been appointed as shōgun of a military expedition against the Emishi.Brown and Ishida, p. 279; Varley, p. 272; Titsingh, p. 99.

809 (): After a reign of four years, Heizei fell ill; and fearing that he would not survive, Heizei abdicated in favor of his younger brother, who would later come to be known as Emperor Saga. After abdicating, Heizei moved to Nara and was henceforth known as Nara no Mikado, the "Emperor of Nara". May 18, 809 (): Emperor Saga was enthroned at age 24. 810 (Kōnin 1): In Heizei's name, the former emperor's ambitious third wife, , and her brother Nakanari organized an attempted rebellion, but their forces were defeated. Kusuko died in poison and her brother was executed. Heizei took the tonsure and became a Buddhist monk.Ponsonby-Fane, p. 318. Brown and Ishida, pp. 281 August 5, 824 (): Heizei died at age 51, 14 years after he had abdicated due to illness.Brown and Ishida, p. 280; Varley, p. 151.

Era of Heizei's reign The years of Heizei's reign are encompassed within one era name (nengō).Titsingh, p. 96. Daidō (806–810)

Kugyō is a collective term for the very few most powerful men attached to the court of the Emperor of Japan in pre-Meiji eras.Furugosho: Kugyō of Heizi-tennō

In general, this elite group included only three to four men at a time. These were hereditary courtiers whose experience and background would have brought them to the pinnacle of a life's career. During Heizei's reign, this apex of the Daijō-kan included: Sadaijin (not appointed) Udaijin, Miwa-no-Oh or Miwa-no-Ohkimi (神王), 798–806. Udaijin, Fujiwara no Uchimaro (藤原内麿), 806–812. Naidaijin Dainagon, Fujiwara no Otomo (藤原雄友), 806–807

When the daughter of a chūnagon became the favored consort of the Crown Prince Ate (later known as Heizei-tennō), her father's power and position in court was affected. Kanmu disapproved of , former wife of Fujiwara no Tadanushi; and Kanmu had her removed from his son's household. After Kanmu died, Heizei restored this one-time favorite as part of his household; and this distinction had consequences.

Chūnagon, Fujiwara no Tadanushi

Consorts and children

Empress (posthumously elevated Kōgō): Fujiwara no Tarashiko/Taishi (藤原帯子; d.794), Fujiwara no Momokawa’s daughterPonsonby-Fane, P. 318; in 806, 12 years after death, this is first time this posthumously elevated rank was bestowed Consort (Hi): Imperial Princess Asahara (朝原内親王; 779–817), Emperor Kanmu’s daughter Consort (Hi): Imperial Princess Ōyake (大宅内親王; d.849), Emperor Kanmu’s daughter Consort (Hi):: Imperial Princess Kan'nabi (甘南美内親王; 800–817), Emperor Kanmu’s daughter Shōshi Court lady (Naishi-no-kami): , former wife of Chūnagon Fujiwara no Tadanushi and Fujiwara no Tanetsugu's daughter Consort (Hi):: Fujiwara Tadanushi's daughter Court lady: Ise no Tsuguko (伊勢継子; 772–812), Ise no Ōna's daughter Third Prince: Imperial Prince Takaoka (高丘親王; 799–865), the Crown Prince in 809 (deposed in 810) Fourth prince: Imperial Prince Kose (巨勢親王; d. 882) Imperial Princess Kamitsukeno (上毛野内親王; d. 842) Imperial Princess Isonokami (石上内親王; d. 846) Third princess: Imperial Princess Ōhara (大原内親王; d. 863), 14th Saiō in Ise Shrine (806–809) Court lady: Fujii no Fujiko/Tōshi (葛井藤子), Fujii no Michiyori's daughter First Prince: Imperial Prince Abo (阿保親王) Court lady: Ki no Iokazu (紀魚員), Ki no Kotsuo's daughter Imperial Princess Enu (叡努内親王; d. 835)

Ancestry

See also

Emperor of Japan List of Emperors of Japan Imperial cult

Notes

References

Ponsonby-Fane, Richard Arthur Brabazon. (1959). The Imperial House of Japan. Kyoto: Ponsonby Memorial Society. Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. Varley, H. Paul. (1980). Jinnō Shōtōki: A Chronicle of Gods and Sovereigns. New York: Columbia University Press. ;