Izumi Shikibu was the daughter of Oe no Masamune, governor of
Echizen. Her mother was the daughter of Taira no Yasuhira, governor of
Etchu. In 995, at the age of 20, Izumi was married to Tachibana no Michisada, governor of
Izumi, the origin for her name. Their daughter was born in 997, Koshikibu no Naishi, who also became a poet. However, Izumi soon divorced, and her former husband died soon afterwards. As is standard for
Heian period women, her name is a composite of "Izumi" from her husband's and her father's official designation of .
Affairs and marriages She had a sequence of affairs at the imperial court in
Kyoto. In the beginning, before her marriage to Michisada, she is believed to have been the companion (some accounts say wife) of a man named Omotomaru at
dowager Queen Shoko's court. While still married to Michisada, she fell in love and had an affair with
Emperor Reizei's third son, Prince Tametaka (Danjo no Miya Tametaka Shinnō:弾正宮為尊親王 977–1002). As a result of the scandal her husband divorced her and her family disowned her. The Eiga Monogatari implies that Tametaka fell ill and died because of his "continual nocturnal escapades." After Tametaka's death, she was courted by , Tametaka's brother. The first year of this affair is described in her semi-autobiographical Diary. Her motive in writing the diary "seems to have been written solely to appease her mind, and to record the poems which passed between them." Izumi then moved into Atsumichi's residence, and the two had a very public courtship until Atsumichi's death in 1007 at the age of 27. Soon after, probably in 1009, Izumi joined the court of
Fujiwara no Shōshi, who was the daughter of
Fujiwara no Michinaga, and the consort of
Emperor Ichijō. Further testimony of the scandal caused by her successive affairs with the Princes Tametaka and Atsumichi can be found in two historical tales (
rekishi monogatari) about the period,
A Tale of Flowering Fortunes (or
Eiga Monogatari), c. mid-eleventh century, and
The Great Mirror (or
Ōkagami), c. late eleventh century. ==Diary==