Yoshimune from the Kishu Tokugawa Family who was adopted into the Tokugawa Shogunate Family had a legitimate son, Ieshige TOKUGAWA, when he was still the lord of the Kishu domain, and Ieshige entered the Edo-jo Castle as an heir when Yoshimune assumed a shogun.
紀州徳川家から徳川宗家へ入った吉宗は、紀州藩主時代にすでに嫡男・徳川家重を儲けており、将軍就任とともに世子として江戸城に入った。