Tsunehisa gave his grandson one of the Japanese characters from Shogun Yoshiharu ASHIKAGA's given name ("haru"), naming him Haruhisa AMAGO, and achieved a promotion to become the Shugo (Governor) of Izumo.
経久は孫に将軍足利義晴の一字　晴の字を受けて尼子晴久と名乗らせ、また出雲守護補任をも果たし、守護代から守護への格式へと家柄を向上させた。