Oichi in the context of "Taira"

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.

Yodo-dono (淀殿) or Yodo-gimi (淀君; [jo.do(ꜜ).ɡʲi.mʲi, -ŋʲi.mʲi], 1569 – June 4, 1615), also known as Lady Chacha (茶々; [tɕaꜜ.tɕa]), was a Japanese historical figure in the late Sengoku period. She was the concubine and the second wife of Japanese ruler Toyotomi Hideyoshi. As the mother of his son and successor Hideyori, she acted as Hideyori's guardian in the restoration of the Toyotomi clan after the fall of the Council of Five Elders, and alongside her son, led the last anti-Tokugawa shogunate resistance in the siege of Osaka.

She was the daughter of Oichi and sister of Ohatsu and Oeyo. When her two younger sisters became prominent members linked to the Tokugawa clan, she and her sisters became vital to maintaining the diplomatic relations between the two most powerful clans of the time, Toyotomi and Tokugawa. Her sister, Oeyo, was the wife of the second shogun, Tokugawa Hidetada, and matriarch of the successive shoguns' lineage, thus receiving the political title Omidaidokoro.

Ohatsu (お初) or Ohatsu-no-kata (お初の方) (1570 – September 30, 1633) was a prominently placed figure in the late Sengoku period. She was daughter of Oichi and Nagamasa Azai, and the sister of Yodo-dono and Oeyo. Alongside her sisters, she was active in the political intrigues of her day. Ohatsu's close family ties to both the Toyotomi clan and the Tokugawa clan uniquely positioned her to serve as a conduit between the rivals. She acted as a liaison until 1615 in the siege of Osaka, when the Tokugawa eliminated the Toyotomi.

Toyotomi Hidekatsu (豊臣 秀勝, 1569 – October 14, 1592) was Toyotomi Hideyoshi's nephew (later adopted) and a Japanese samurai of the Sengoku period. He was the lord of Gifu Castle between 1591-1592.

He was the second son of Hideyoshi's sister, Tomo, with Miyoshi Kazumichi. His childhood name was Kokichi and given that he is often confused with Hashiba Hidekatsu (fourth son of the Oda Nobunaga and also adopted son of Toyotomi Hideyoshi), historians refer to him as Kokichi Hidekatsu for convenience. He married Oeyo, daughter of Oichi and Azai Nagamasa and the sister of Yodo-dono.