Furthermore, the oppression of the Yamana clan by the Tsunehisa AMAGO in the Izumo Province, Yoshioki OUCHI in the Suo Province and Muramune URAGAMI in the Bizen Province began; the only territories they managed to govern were Tanba, during the generation of Nobutoyo YAMANA, the son of Masatoyo, and Inaba, during the generation of his grandson, Nobumichi.
さらに出雲国の尼子経久、周防国の大内義興、備前国の浦上村宗らの圧迫を受けるようになり、次第に領土を奪われて、政豊の子・山名誠豊の時代には、誠豊が但馬、山名豊時の孫・山名誠通が因幡をかろうじて支配するという状態に陥った。