According to Ehon Taikoki, the one that defended Sacheon Waeseong (Old Sacheon Waeseong) was Sadamasa (his name was written as 定正 or 貞昌 with same pronunciation), who had the title of Ise Hyobu shoyu (junior assistant minister of the Hyobusho Ministry of War in Ise Province).
絵本太閤記では、泗川城（泗川古城）を守備していたのは伊勢兵部少輔定正（貞昌）となっている。