However, under the system that existed prior to the enforcement of the Law for the Protection of Cultural Properties, which occurred in 1950, all of what are now designated as important cultural properties were called national treasures, so this point should be noted in order to avoid confusion.
なお、1950年（昭和25年）の文化財保護法施行以前の旧制度下では、現在の「重要文化財」に相当するものがすべて「国宝」と称されていたので混同しないよう注意を要する。