Song Ikp'il (; February 10, 1534 â August 8, 1599) was a Korean politician and Neo-Confucian scholar and educator of the Joseon period. His art names were Kubong () and Hyà Ânsà Âng (), and his courtesy name was Unjang (). Song was best friends of Yi I, Sà Âng Hon and Chà Âng Ch'à Âl and taught Kim Jang-saeng.