In 1951seven structures of the castle including tenshu were designated as Important Cultural Property, and among them two structures (tenshu, tsuke-yagura (Connecting Tower) and Tamon yagura (hall turrets)) were designated as National Treasure.
1951年天守等7棟がに重要文化財に指定、うち2棟（天守、附櫓、および、多聞櫓）がに国宝に指定された。