He was warden of a castle in a province under the control of Toyotomi Hideyoshi. Hideyoshi caused Kazunari to marry Oeyo, the sister of a favorite concubine. When Kazunari's support for Tokugawa Ieyasu became known, Hideyoshi took back the woman. She later married Ieyasu's son Tokugawa Hidetada and mothered the shōgun Tokugawa Iemitsu.[2]
^Abe, Takeshi (1987). "Saji Kazunari". Sengoku jinmei jiten (in Japanese). Tokyo: Shinjinbutsu Ōraisha. p. 368. ISBN4404014120.
^ abTurnbull, Stephen R. (2000). The Samurai Tradition, Vol. 2, p. 149; excerpt, "Hideyoshi married Oeyo the younger sister of Yodo-Dono his chief concubine to Saji Kazunari, warden of a castle in a province under his control, but he took her back when her husband assisted Ieyasu, with whom he was then at war."