His gaining control of the Imperial court meant that the Toyotomi clan would lose the means of regaining the clan's former power, and therefore, was important for the stabilization of his government after the nation was unified.
朝廷を掌握すれば豊臣氏が形勢挽回する道はなく、天下統一の後において政権の安泰を図る上で重要であった。