The Imperial Crown Style was a genre of Japanese modernist architecture generally found in 1930s-1940s government buildings. It appears to have mostly skipped southern Korea, but traces of the style can still be seen today. In Volume 92 of Transactions, a journal published by the Royal Asiatic Society – Korea Branch, you may find a short article that I’ve written focusing on just this subject. If you are unable to get a copy of the journal (it can be somewhat difficult to get your hands on), you may use the link below to read the article. Use the link below to download the article in PDF form.
Nate Kornegay, “Traces of the Imperial Crown Style in Colonial Korea,” Transactions 92 (2017), 21-30.