Ji Cheong-Cheon (지청천, 池靑天), also known as Yi Cheong-Cheon (이청천, 李靑天) (1888-1959) was a Korean independence activist during the period of Japanese rule (1910-1945). He later became a South Korean politician. His name was originally Yi Dae Hyong but took up the nom de guerre Ji Cheong-Cheon, meaning Earth and Blue Sky, while leading Korean guerrilla forces against the Japanese.