In 1366, the first "kanrei" office holder's father, Shiba Takatsune who held real power over his thirteen-year-old son, and who engineered the placement of Shiba family members in key government offices was declared a traitor, because of his growing power and arrogance (he felt demeaned by accepting the "kanrei" post, so he had his son appointed instead). In the first show of force against an important "shugo" family, Yoshiakira ordered the Yamana, Sasaki, Yoshimi and the Toki "shugo" lords to attack the Shiba in the province of Echizen. The Shiba were defeated, and their territory in Echizen was redistributed. In 1367, following the ouster of the Shiba family, Hosokawa Yoriyuki was named as the successor to the post of "kanrei": after the shōgun Yoshiakira's death, Yoriyuki managed during the minority of the young shōgun Yoshimitsu to place the regime on a firmer foundation.