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Oeyo (於江与), Gō (江), Ogō (小督) or Satoko (達子) : 1573 – September 15, 1626) was a noblewoman in Japan's 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.

Oeyo married three times, first to Saji Kazunari, her cousin, then to Toyotomi Hideyoshi's nephew, Toyotomi Hidekatsu. She had a daughter with Hidekatsu named Toyotomi Sadako, who later married Kujō Yukiie. Her third and last husband Tokugawa Hidetada became the second Tokugawa shōgun. She was also the mother of his successor Iemitsu, the third shōgun. Her children included Senhime, Tamahime, Katsuhime, Hatsuhime, Takechiyo (Iemitsu), and Tadanaga. Hatsuhime was adopted by Oeyo's sister Ohatsu, who was married to Kyōgoku Takatsugu.

Surviving record books from merchants of luxury goods provide insight into patterns of patronage and taste amongst the privileged class of women like Oeyo and her sisters.