駿府城
Within a short time after taking up residence in Sunpu Castle, Lady Saigō's health began to deteriorate. It was said that "physical and emotional hardships" were taking their toll on her health, but nothing could be done to help her. Lady Saigō died on July 1, 1589, at the age of 37. The cause of her early death was never determined, and while murder was suspected at the time, no culprit was identified. There were later rumors that she was poisoned by a maidservant devoted to Ieyasu's late wife, the Lady Tsukiyama.