For the next hundred years there was ongoing maintenance and renovation of the existing structures. In 1669 (Kanbun 9), repairs were made to the main keep walls and roofs. In November 1685 (Jōkyō 2), repairs were again made to the main keep roof; in March 1709 (Hōei 6) to the first and second stories of the main keep; in August 1720 (Kyōhō 5) to the "chidorihafu" gables on the third and fourth levels of the main keep; and in December 1726 (Kyōhō 11) to the third-level roofs, "karahafu" gables, the fourth-level roofs, and the copper tiles of the fifth-level roofs of the main keep. Repairs were also made to the golden "shachi" of the main keep, replacing their wooden core. Further work was carried out in August 1728 (Kyōhō 13) on the shingled roof of Honmaru Palace, remodeling it into a lightweight, informal roof. Repairs were made to the second-, third-, and fourth-level roofs of the main keep.