Kim Chung-seon (1571–1642), birth name Sayaka (沙也可) and often known by his pen name Mohadang, was a Japanese general who defected to Korea during the Japanese invasion. After his defection, Kim served in the Joseon army, contributing to Korean victories over Japanese forces in the battles of and Ulsan. Thereafter he was granted his Korean name, on the recommendations of Gwon Yul and others, and was made part of the Gimhae Kim lineage.