In 1603, he became the seii taishogun (literally, 'great general who subdues the barbarians") and established the Edo bakufu (feudal government headed by Ieyasu), and in 1605, he passed over the shogunate to his son Hidetada TOKUGAWA in order to secure the legitimacy of the Tokugawa Administration, and consequently, the head family of Toyotomi completely lost its authority over the country.
1603年に家康は征夷大将軍に就任して江戸幕府を開き、1605年には将軍職を子の徳川秀忠に譲って徳川政権の正統性を確立していき、豊臣宗家は全国政権の座から完全に滑り落ちてしまった。