When she got married, she became the adopted child of Ienobu TOKUGAWA, the sixth Seii taishogun (literally, "great General who subdues the barbarians") of the Edo bakufu (Japanese feudal government headed by a shogun), because his lawful wife Hiroko KONOE was Hisako's aunt.
なお入内に際し、正室の近衛熈子が伯母にあたる縁から、江戸幕府第6代征夷大将軍徳川家宣の猶子となっている。