일제 강점기가 · 일제 강점기를
Japanese colonial period (1910–1945)
Example
일제 강점기에 많은 사람들이 독립운동을 했습니다.
During the Japanese colonial period, many people took part in the independence movement.
Word parts
일 Japan+제 empire+강 force+점 occupy+기 period
Literally 'period of forced occupation by imperial Japan'.
Good to know
Koreans use this term, not 'colonial era', to stress the occupation was forced.