In pursuance of this plan, he sent his son Hidetada to the emperor to make a full report of everything that had been done in the settlement of the affairs of the country. The emperor was graciously pleased to approve his acts and to bestow upon him, A.D. 1603, the hereditary title of Sei-i-tai-shōgun. This was the title borne by Yoritomo when he was the real ruler of the country. Since that time there had been a long line of shōguns, the last of whom was Ashikaga Yoshiaki, whom Nobunaga deposed in 1573, and who had died 1597. With this new appointment began a line of Tokugawa shōguns that ended only with the restoration in 1868. Ieyasu’s most radical change in the system of government consisted in the establishment of the seat of his executive department at Yedo. Since A.D. 794 Kyōto had been the capital where successive emperors had reigned, and where Nobunaga and Hideyoshi exercised executive control. Kamakura had been the seat of Yoritomo and his successors. But Ieyasu saw advantages in establishing himself in a new field, to which the traditions of idleness and effeminacy had not attached themselves, and where the associations of his own warlike career would act as a stimulus to his contemporaries and successors. He remained at Fushimi until necessary repairs could be made to the Castle of Yedo(200) and the roads between it and the capital put in order. The place which henceforth was to be the principal capital of the country first comes into notice, as we have before mentioned, as a castle built by Ōta Dōkwan in A.D. 1456. He had been placed here by the authorities of Kamakura to watch the movements of the restless princes of the north. Recognizing the strength and convenience of the high grounds on the border of Yedo bay, he built a castle which, through many transformations and enlargements, finally developed into the great feudal capital of the Tokugawa shōguns. It was here that Ieyasu, after the fall of Odawara, by the advice of Hideyoshi,(201) established himself for the government of the provinces of the Kwantō which had been given to him.