畠山氏
Later, Date Masamune used the castle as a base for attacking the Hatakeyama clan, and stayed in this castle until August 1586. After a while, Sadatsuna surrendered to Masamune and became one of his retainers. In 1591, Gamō Ujisato took control of Shiomatsu, and assigned Gamō Chūzaemon as castellan and lord of a 25,000 "koku" domain. The surviving stone wall at the present-day ruins of the main castle is from this time. The Gamō were subsequently displaced by the Uesugi clan during which time Yamaura Kagekuni became castellan.