On March 24, 1603, Ieyasu assumed the post of Seiitaishougun (Barbarian Subduing Generalissimo) in Fushimi-jo Castle, established the Edo bakufu (Japanese feudal government headed by a shogun) and started to strengthen his political power by performing construction projects including Edo Castle.
慶長8年2月12日(旧暦)（1603年3月24日）、家康は伏見城で征夷大将軍に就任、江戸幕府を開き、江戸城を始め普請事業を行うなど政権作りを始める。