However, the real political power was in the hands of his father, and after his father died in 1491, Yoshiki tried to gain full control of the government with the support of Masanaga HATAKEYAMA, but came into conflict with the Kanrei, Masamoto HOSOKAWA, and Yoshimasa's widow, Tomiko HINO.
しかし政治の実権は父に握られ、父が延徳3年（1491年）に死去した後は、畠山政長の支援を背景に権力の確立を企図するが、管領の細川政元と義政未亡人の日野富子らと対立した。