Having moved from place to place, from Jurakudai to Fushimi, and then to Osaka, Irohahime was engaged to Ieyasu's son, Tadateru, on January 20, 1599, as part of Ieyasu's strategy for strengthening relationships with powerful daimyō.
As she lived in the Nishikan (the west annex) of the main castle in this period, she was also called Lady Nishikan (西館殿).