North Korea
Japan tried to suppress Korean traditions and culture and ran the economy primarily for its own benefit. Korean resistance groups known as Dongnipgun (Liberation Army) operated along the Sino-Korean border, fighting guerrilla warfare against Japanese forces. Some of them took part in allied action in China and parts of South East Asia. One of the guerrilla leaders was the communist Kim Il-sung, who later became the first leader of North Korea.
List of leaders of North Korea
Kim Il-sung died on 8 July 1994, but has since 1998 been posthumously named the "Eternal President of the Republic". Thus his son and successor as leader, the late Kim Jong-il, was not given the title of President and the President of the Presidium of the Supreme People's Assembly became "de jure" head of state.