She is the third daughter and youngest child of , the chairman of the Aso Company (best known originally for its activities in the development of coal mines and metallurgy, but today mainly specializing in cement making, as well as being in the medical, environmental and real estate business) and a member of the House of Representatives from 1949 to 1955. He was also a close associate of Prime Minister Kakuei Tanaka. Her mother, , was the daughter of Prime Minister Shigeru Yoshida. Her elder brother is the former Prime Minister and current Deputy Prime Minister Tarō Asō.