この作品は、次の理由でパブリックドメインに属します。According to the Copyright Law of North Korea, The property rights to a copyrighted work or a copyrighted visual art work whose author is an institution, enterprise or organization shall be protected for up to 50 years from the moment of its publication. (Article 24)
{{Information |Description={{en|Okryugwan interior circa 1960}}{{ja|1960年頃の玉流館内部}}{{ko|1960년경의 옥류관 내부}} |Source={{en|Korean book (Japanese version) "Korea Today" published by Foreign Languages Publishing (North Korea).}}...