He is the grandson of Shigeru Yoshida, a postwar prime minister.He is married to the daughter of another, and his sister is a princess through marriage to a cousin of Emperor Akihito.

• 他的外祖父吉田茂是日本战后的首相，他的妻子是另一位前首相的女儿，他的妹妹嫁给了明仁天皇的堂弟。