In the era of Tsunehisa, as the Amago clan did not have a big influence in Izumo Province, Okihisa, the third son of Tsunehisa, was put for adoption to the Enya clan to increase the influence of the Amago clan, but the tactic finished in failure, as Okihisa rose in revolt.
出雲国内の尼子氏が及ぼす影響力は経久の時期は低く、それらの解決策として三男興久を塩冶氏に養子に出すも、それが裏目に出て実子の反乱という失策を招いている。