 Amago Tsunehisa from Izumo Province saw this as an opportunity to commence an invasion.In order to strike against members of the Amago residing in the capital, Yoshioki became the "shugo" of Iwami in 1517, and banded together with wealthy families from Iwami Province, including the Masuda and Kikkawa clans.Nevertheless, unable to halt the expanding influence of the Amago, in 1518, Yoshioki resigned his official post as "kanreidai" and left Sakai to return to Yamaguchi.