Citadels were restored, especially castle towers that were built from before the war in the Showa period, reconstructed imitation keeps were built in Sumoto-jo Castle and Ueno-jo Castle and a reconstructed tenshu (keep) that was built on Osaka-jo Castle.
昭和の戦前より城郭建築の復興事業、特に天守の建設が行われ、洲本城や上野城などに模擬天守、大坂城には復興天守が建てられた。