Yoshitaka Tsugaru was originally from the Owari branch of the Tokugawa clan.

Hanako met her future husband, Prince Masahito, during her studies at Gakushuin.

As tradition dictates, upon her entry into the imperial family and like other members, she received a personal emblem (o-shirushi (お印)): Rhododendron subg.

[3] In 2017, the Princess was diagnosed with lumbar spondylosis and was hospitalized in September for further treatments.

The late Setsuko, Princess Chichibu was also a descendant of the Mito-Tokugawa line, and was her fourth cousin once removed.

Prince and Princess Hitachi are also cousins several times over, but are most directly fifth cousins through their descent from the Ōgimachisanjō clan; their most recent common ancestor is their four-times great-grandfather Ōgimachisanjō Kinnori (1774–1800), a senior courtier.