Emperor Heizei
, also known as "Heijō-tennō", was the 51st emperor of Japan, according to the traditional order of succession.
Heizei's reign lasted from 806 to 809.
Fujiwara no Otomuro
Fujiwara no Otomuro( 藤原乙牟漏], 760 – April 28, 790) was a Japanese noblewoman and Empress consort of Japan.
Her sister was Fujiwara no Moroane.
Fujiwara no Otomuro was a daughter of a noble called Fujiwara no Yoshitsugu; her mother was the granddaughter of general Fujiwara no Umakai, who died in 737.
She married Emperor Kanmu.
Their children included:
She also had a daughter, Princess Koshi.
Her daughter- in- law was Lady Tachibana no Kachiko.
Fujiwara no Koshi
She was the daughter of regent Fujiwara no Kanemichi.
She was placed in the Imperial harem to benefit her father in his rivalry with his brother Fujiwara no Kaneie by giving birth to an heir.
She did not give birth to a Crown Prince and was replaced as an Empress by the daughter of her father's cousin and designated successor as regent, Fujiwara no Yoritada.
Fujiwara no Moroane
Fujiwara no Moroane was a Japanese noblewoman and sister- in- law of Emperor Kanmu of Japan.
Moroane was a member of the famous Fujiwara clan.
Her father was a nobleman called Fujiwara no Yoshitsugu.
Her mother was Abe no Komina.
Her sister was Empress Fujiwara no Otomuro, wife of Emperor Kanmu.
Moroane was an aunt of Emperor Heizei and Emperor Saga.
Moroane married courtier Fujiwara no Momokawa.
Their children were:
Her grandson was Emperor Junna.
Fujiwara no Nobunaga
Fujiwara no Nobunaga( 藤原 信長; 1022 – October 14, 1094), third son of Norimichi, was a" kugyo"( Japanese noble) of the Heian period.
His mother was a daughter of Fujiwara no Kintō.
Although his father Norimichi was regent of Emperor Go- Sanjo and Emperor Shirakawa, Nobunaga could not become regent.
After Norimichi's death, the position of regent was passed down the line of Yorimichi, the first son of Fujiwara no Michinaga.
He became Daijō Daijin in 1080, but his order of precedence was next to Nobunaga's cousin regent Fujiwara no Morozane.
Fujiwara no Seishi
Fujiwara no Seishi( 藤原娍子)( 972–1025) was the consort of Emperor Sanjō of Japan.
She was the first daughter of Fujiwara no Naritoki( 藤原済時).
Her father was the cousin of the regent Fujiwara no Michinaga.
She was arranged to marry the future Emperor one year after his succession.
The Emperor already had an Empress, Fujiwara no Kenshi, who was the daughter of the regent Michinaga and cousin of Seishi.
However, Fujiwara no Michinaga had introduced the custom of the Emperor having two Empresses: one called" Chugu", and the other called" Kogo".
Fujiwara no Michinaga agreed for Fujiwara no Seishi to be given the title of Empress( as" Kogo"), but he demonstrated that Seishi was to have lover rank than his daughter in practice by making sure that virtually no one attended the ceremony in which Seishi was made Empress.
When the courtiers where summoned to the elevation ceremony of the second Empress, they laughed at the messengers and gathered at the appartemens of the Empress Kenshi instead.
Empress Seishi was reportedly well liked by the Emperor, but she was overshadowed at court by Empress Kenshi, and never managed to exert any influence.
She became a nun in 1019, one year after her husband's abdication.
Fujiwara no Taishi (died 794)
Fujiwara no Taishi (藤原 帯子, also read Fujiwara no Tarashiko; died 794) was a Japanese noblewoman of the Nara period.
She was a consort of Prince Ate.
She bore him no children, but more than a decade after her death she was granted the title of empress on her husband's becoming Emperor Heizei.
Fujiwara no Junshi
She was the daughter of regent Fujiwara no Yoritada.
She was placed in the harem of the Emperor to benefit her father in his rivalry with his cousin Fujiwara no Kaneie, who also placed his daughter Fujiwara no Senshi for the same reason, that she would give birth to a Crown Prince and became Empress: Fujiwara no Junshi did become Empress, but it was Fujiwara no Senshi who gave birth to a Crown Prince, while Junshi had no children.
She ordained as a Buddhist nun in 997.
Fujiwara no Hiroko
, also known as, was an empress consort of Emperor Go- Reizei.
She was the eldest daughter of Fujiwara no Yorimichi and Fujiwara no Gishi.
Fujiwara no Morozane was her brother by the same mother.
Fujiwara no Morozane
Fujiwara no Morozane
( Japanese language: 藤原 師実 ふじわらの もろざね)
( 1042 – March 14, 1101) was a regent of Japan and a chief of the Fujiwara clan during the late Heian period.
He was known as Kyōgoku dono( Lord Kyōgoku) or Go- Uji dono( the Later Lord Uji, 後宇治殿).
He held the positions of sessho or kanpaku for a twenty- year period, sessho from 1075 to 1086 during the reign of Emperor Shirakawa and from 1094 to 1099 during the reign of Emperor Horikawa, and kampaku from 1086 to 1094 during the reign of Emperor Horikawa.
He was the son of Fujiwara no Yorimichi and Fujiwara no Gishi( 藤原 祇子, her real name is unknown today), a daughter of Fujiwara no Tanenari( 藤原 種 成), hence the grandson of Fujiwara no Michinaga.
A contemporary document suggested he was the third born son, but this is uncertain.
He was appointed to the positions of sadaijin, sessho and kampaku.
He made his adopted daughter Kenshi( 賢子) a consort of Emperor Shirakawa.
Kenshi died when she was very young, but she left a son who would later ascend to the throne as Emperor Horikawa.
Emperor Shirakawa seized political power and Morozane was unable to enjoy the monopolic power that his father and grandfather had enjoyed.
Even after Emperor Horikawa reached adulthood, the cloistered Emperor Shirakawa seized power.
Morozane married Fujiwara no Reishi, who was a daughter of Minamoto no Morofusa, a grandson of Emperor Murakami, and later adopted by Fujiwara no Nobuie.
Morozane had many sons and daughters, including Fujiwara no Moromichi and Fujiwara no Ietada.
From Morozane, two kuge families derive, the Kazanin family and the Oimikado( Oinomikado) family.
Morozane is also known the author of the waka collection" Kyōgoku Kanpakush ū"( Anthology of Kyōgoku Kanpaku) and the diary" Kyōgoku Kanpaku- ki"( Diary of Kyōgoku Kanpaku).

Question: What nationality is Fujiwara No Taishi (Died 794)'s husband?
Answer: Japan