Because Emiko's elder sister, or SHODA's first daughter, is Michiko (of the Imperial Family), the Sumitomo Family is related by marriage to the Imperial Family through the Anzai and Shoda families.
恵美子の姉、すなわち正田の長女が美智子(皇室)であるので住友家は安西家・正田家を通じて皇室と姻戚関係でつながっている。