Princess Sukeko

Princess Sukeko (亮子内親王; 1147 – 27 April 1216), later Inpumon'in (殷富門院), was a princess and an Empress of Japan. Sukeko was empress as the Honorary Mother (准母) of her nephews Emperor Antoku and Emperor Go-Toba.

Biography
She was the daughter of Emperor Go-Shirakawa and Lady-in-Waiting Fujiwara Shigeko, and the sister of Emperor Takakura. She was appointed Honorary Mother to her nephews, who reigned in succession as Emperor Antoku and Emperor Go-Toba. As their Honorary Mother, she was Honorary Empress and performed the court functions of the position of Empress during their reign.