Oeyo (於江与), Gō (江), Ogō (小督) or Satoko (達子) : 1573 – September 15, 1626) was a prominently-placed female figure in the Azuchi–Momoyama period and early Edo period. She was a daughter of Oichi and the sister of Yodo-dono and Ohatsu. When she rose to higher political status during the Tokugawa shogunate, she took the title of "Ōmidaidokoro". Following the fall of the Council of Five Elders, Oeyo and her sisters were key figures in maintaining a diplomatic relationship between the two most powerful clans of their time, Toyotomi and Tokugawa. Due to her great contributions to politics at the beginning of the Edo period she was posthumously inducted into the Junior First Rank of the Imperial Court, the second highest honor that could be conferred by the Emperor of Japan.

Oichi was a female historical figure in the late Sengoku period. She is known primarily as the mother of three daughters who became prominent figures in their own right – Yodo-dono, Ohatsu and Oeyo. Oichi was the younger sister of Oda Nobunaga; and she was the sister-in-law of Nōhime, the daughter of Saitō Dōsan. She was descended from the Taira and Fujiwara clans.