The castle became the headquarters of the ''[[Osaka jodai|Osaka jôdai]]'', the shogunate's chief administrator over the city and the immediate surrounding region. Four ''daimyô'' of the surrounding areas were assigned to oversee the castle's guard duty, rotating every eight months.<ref>Arai Hakuseki, Joyce Ackroyd (trans.), ''Told Round a Brushwood Fire'', University of Tokyo Press (1979), 280n16.</ref> | The castle became the headquarters of the ''[[Osaka jodai|Osaka jôdai]]'', the shogunate's chief administrator over the city and the immediate surrounding region. Four ''daimyô'' of the surrounding areas were assigned to oversee the castle's guard duty, rotating every eight months.<ref>Arai Hakuseki, Joyce Ackroyd (trans.), ''Told Round a Brushwood Fire'', University of Tokyo Press (1979), 280n16.</ref> |