Fujiwara no Tamako or Fujiwara no Shōko (藤原 璋子; 1101 – September 10, 1145), also known as Taikenmon'in (待賢門院), was an empress consort of Emperor Toba of Japan, and mother of Emperor Sutoku and Emperor Go-Shirakawa. She was the eldest daughter of Fujiwara no Kinzane (藤原公実).
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Biography
Tamako's father died when she was seven years old, and she was raised by the retired Emperor Shirakawa and his favorite mistress Gion no Nyōgo (祇園女御) (Gion no Nyogo was Taira no Tadamori's wife and mother of Taira no Kiyomori). Once she grew up, she was almost engaged to the heir of the regent Fujiwara clan, Fujiwara no Tadamichi, but his father Fujiwara no Tadazane incurred Shirakawa's displeasure by declining the offer due to rumors about Tamako's behavior.
In early 1118, with Shirakawa as her godfather, Tamako entered the court of her cousin Emperor Toba. Just a month later, she was invested as Empress Consort (chūgū). In mid-1119 she bore Toba's first child, Prince Akihito. In early 1123, Shirakawa had the five-year-old Prince Akihito ascend to the throne as Emperor Sutoku, and in 1124 Tamako was bestowed the title Taikenmon-in. Around this time Tamako also bore Princess Kishi, Prince Michihito, and Prince Kimihito, but these two princes were born handicapped. She bore Princess Muneko in 1126, and Prince Masahito less than a year later, in 1127. In 1129 she had her final child, Prince Motohito.
Tamako bore Toba a total of seven children, and also accompanied him on a trip to the Kumano shrines, but this was all during the lifetime of Shirakawa. When the long-governing retired emperor died in 1129, her life took a turn for the worse. The retired Emperor Toba inherited Shirakawa's reign, commanding the courtiers and isolating the young Emperor Sutoku. He reinstated the kampaku Shirakawa had dismissed, Fujiwara no Tadazane, and married Tadazane's daughter Fujiwara no Yasuko to the young emperor, investing her as kōgō. Furthermore, he transferred his affections from Tamako to another wife, Fujiwara no Nariko. In 1139, Toba appointed his three-month-old son with Nariko, Prince Narihito, as crown prince, and in 1141 pressed Sutoku to resign, letting Narihito take the throne as Emperor Konoe.



