Also, the Bakufu (Tokugawa Shogunate) ordered the Saigoku Daimyo (territorial lords in western Japan) to drastically renovate Kameyama-jo Castle into a new structure of the time under 'Tenka Fushin' (the Bakufu's order of national construction of infrastructure).
さらに「天下普請」により幕府が西国大名に命じ近世城郭として亀山城を大修築した。