He was given important posts by the sixth shogun Yoshinori ASHIKAGA and the eighth shogun Yoshimasa ASHIKAGA and, by using his talent in writing, was assigned to develop diplomatic correspondence for the Muromachi bakufu (Japanese feudal government headed by a shogun).
6代将軍足利義教、8代将軍足利義政に重用され、文筆の才により室町幕府の外交文書の作成にあたった。