Seoul

Joseon de facto · 1789 – October 12, 1897 (from the border data)
Korean Empire de facto · October 12, 1897 – August 27, 1910 (from the border data)
Japan de facto · August 27, 1910 – May 2, 1947 (from the border data)
South Korea de facto · since August 15, 1948 (from the border data)
North Korea de facto · June 28, 1950 – September 15, 1950 Military occupation (from the border data)
North Korea de facto · January 4, 1951 – March 14, 1951 Military occupation (from the border data)

Korea under Japanese rule August 29, 1910 – September 2, 1945 From Wikidata (capital, P36)
South Korea From Wikidata (capital, P36)