About this particular investigation, refer to "Bones speak, Tokugawa Shogun and Daimyo families" and "Tombs of the Tokugawa Shogun families in Zojo-ji Temple and their articles left and bodies" written by Hisashi Suzuki.
この調査については、鈴木尚の『骨は語る徳川将軍・大名家の人びと』、『増上寺徳川将軍家墓とその遺品・遺体』を参照のこと。