When the excavation and research of graveyards of the Tokugawa family in Zojo-ji Temple, which was led by Hisashi SUZUKI, was conducted after the war, Sugen-in's grave was also excavated and her remains were researched.
戦後、鈴木尚が中心となって行なわれた増上寺の徳川家墓所発掘調査の際に、崇源院の墓も発掘され、その遺骨も調査された。