Table 1. Classification by year and scope of South and North Korea.

Year	Events	Scope of South or North Korea
1925–1945	Japanese colonial era	South and North Korea
1945–1950s	1945–1953 (from liberation to the end of the Korean War)	South Korea
	1953–1959 (after the Korean War)
1960–1990s	Period of birth control policy (1961–1995)	South Korea
2000–2020s	The 1st, 2nd, and 3rd plans for low birth rate and aging society in Korea	South Korea
2021–2060	Long-term demographic prospects (from the 4th plan for low birth rate and aging society in Korea)	South Korea