However, Mitsusuke was affected by Yoshinori's policies more than Mochikuni and assassinated the Shogun in 1441 in what is known as the Kakitsu Incident.
しかし、持国以上に義教の行動に恐怖を覚えた満祐が、1441年(嘉吉元)に将軍義教を暗殺する事件が勃発する（嘉吉の変）。