In 1576, Nobunaga ODA appointed Nagahide NIWA to the Sofushin Bugyo (head of shogunate administrator concerned with the construction works) involved in the construction of Azuchi-jo Castle on Mt. Azuchi, where the subsidiary castles of Kannonji-jo Castle had been situated.
織田信長は観音寺城の支城のあった安土山に建造する安土城の総普請奉行に丹羽長秀を据えた。