皇室典範
The offices and titles of "sesshō" and "kampaku" were abolished by the declaration of the Imperial Restoration in 1868 during the Meiji Restoration in order to reorganize the government structure. The office and title of "sesshō" was stipulated under the former Imperial Household Law in 1889 and also under the new Imperial Household Law in 1948. Under these laws, the officeholder of "sesshō" is restricted to a member of the Imperial family. Crown Prince Hirohito, before becoming Emperor Shōwa, was "sesshō" from 1921 to 1926 for the mentally disabled Emperor Taishō. He was called .