Tachibana no-Michiyo was a court lady of early Nara period and mother of Empress Kōmyō.
Background
Tachibana no-Michiyo was born approximately in 655. She was a daughter of Motohito Agata-Inukai. In 679, around 15 years old, Michiyo became a Myōbu. In November 684, her clan was given honorary surname "Tachibana Sukune" by Empress Genmei.
Career
Before the birth of her first child, Tachibana had become the wet nurse of later Emperor Monmu, and highly trusted by his mother Empress Genmei and paternal grandmother Empress Jitō.
Using her influence, she later made Fuhito's first daughter Miyako, by Kamonohime, a consort of Emperor Monmu. When Miyako and Emperor Monmu's child Emperor Shōmu had grown up, he take his younger half-aunt Fujiwara no Kōmyōshi as empress, having a daughter Empress Kōken and a son Prince Motoi. His other consorts are all descendants of Michiyo and/or Fuhito. Using this kind of excessive inbreeding method, Michiyo and Fuhito had ensured their genes rooted in the Imperial house of Japan.
Tachibana served many Emperors, including Emperor Temmu. In consideration of her long services to the Imperial family Emperor Gemmei gave her the title of Agata-Inukai Tachibana-no Sukune Michiyo and allotted her a pension and the services of servants.
Connections
Tachibana married Prince Minu, a descendant of Emperor Bidatsu first and bore 3 children - Prince Katsuragi (later Tachibana no Moroe), Prince Sai (later Tachibana no Sai) and Princess Moro.
After his death, she quickly hooked with Fujiwara no Fuhito, while his principal wife had died at that time. They have a daughter named Kōmyōshi, which is Fuhito's third daughter.
Many of Michiyo's descendants also get married to Fuhito's descendants. It's unknown that Fuhito's fourth daughter, Tahino, the principal wife of Tachibana no Moroe is by her.