Japanese annexation of Korea

The Japanese annexation of Korea happened in 1910. The Empire of Japan annexed (made part of its territory) the Korean Empire. In Japanese it is also called 日韓併合、朝鮮併合、日韓合邦 which translate as annexation of Korea, annexation of Joseon (an old name of Korea), and unification of Japan and Korea. 
Then Japanese ruled Korea until 1945, after the Potsdam Conference at the end of World War II.