Ieyasu TOKUGAWA who established the Edo bakufu retired in 1605, only 2 years after he became shogun, and handed the position over to his third son Hidetada TOKUGAWA, and moved his residence to the Sunpu-jo Castle.
江戸幕府を開いた徳川家康も1605年、つまり将軍職に就任してからわずか2年で、三男の徳川秀忠に将軍職を譲って居城を駿府城に移している。