In 1704 Shogun Tsunayoshi gave up waiting for the birth of a son and invited Ienobu to become his successor, and Ienobu and his legal wife, Hiroko, entered the Edo-jo Castle.
また1704年、将軍綱吉は遂に男子誕生を断念して家宣を後継者として迎え、家宣と正室・熈子が江戸城に入った。