Midaidokoro

The midaidokoro (御台所) was the official wife of the Shogun. During the Edo period, she resided in the Ōoku of Edo Castle and sometimes wielded considerable political power behind the scenes. This title first use by Oeyo wife of second shogun, Tokugawa Hidetada.
List of Midaidokoro:
Oeyo, wife of Tokugawa Hidetada
Takatsukasa Takako, wife of Tokugawa Iemitsu
Asa no Miya, wife of Tokugawa Ietsuna and daughter of Fushimi no Miya Sadakiyo
Konoe Nobuko, wife of Tokugawa Tsunayoshi
Takatsukasa Hiroko, later Ten-ei'in, wife of Tokugawa Ienobu
Yoshiko no Miya (1709-1717), wife of Tokugawa Ietsugu and daughter of Emperor Higashiyama
Nami No Miya, wife of Tokugawa Ieshige and daughter of Prince Fushimi-no-miya Kuninaga (1676-1726)
Shimazu no Shigehime or Tadakohime, wife of Tokugawa Ienari
Arisugawa Takako (1795-1840), wife of Tokugawa Ieyoshi and daughter of Prince Arisugawa Orihito
Shimazu Atsuhime or Fujiwara no Sumiko, later Tenshoin, wife of Tokugawa Iesada and daughter of Shimazu Nariakira, adopted daughter of Konoe Tadahiro
Chikako, Princess Kazu, later Seikan'in-no-miya, wife of Tokugawa Iemochi and daughter of Emperor Ninko
Tokugawa Mikako (1835-1894), wife of Tokugawa Yoshinobu