Tsunayoshi had no male child either, but because Tsunayoshi's son-in-law Tsunanori TOKUGAWA was among the leading candidates as heir, he changed his name to Ienobu as heir to the shogun after Tsunanori's death and took residence in the western citadel of Edo-jo Castle in December 31, 1704, at age 43.
綱吉にも世嗣がいなかったが、綱吉娘婿の徳川綱教も後継候補だったため、綱教の死後、将軍世嗣として「家宣」と改名して江戸城西の丸に入ったのは宝永元年12月5日(旧暦)（1704年12月31日）、家宣が43歳の時だった。