Imperial Household Agency

The is a government agency of Japan. This bureaucracy is concerned with Imperial House of Japan (Japan's imperial family).
"Kunaichō" keeps the Privy Seal of Japan and the State Seal of Japan.
In the 18 centuries before the Second World War, it was named the .
The current Grand Steward is Shingo Haketa.
History.
The organization and functions of the Imperial Household were established in the eighth century. The fundamental elements of this system evolved during the course of centuries.
The main focus of attention is the living Imperial family. At the same time, the agency looks 890+ sites which may contain the remains of imperial family members.
Organization and Functions.
The Grand Steward is charged with overseeing all activities of today's agency. 
Legal foundation.
The basic structures remained in place until the Meiji Restoration; and some elements of the ancient organizing template remain:
Imperial Household Agency became an external agency of the Cabinet Office.____________________
 Imperial Household Agency was the new name of Imperial Household Office; and the Imperial household became an external agency of the Prime Minister's Office.____________________
Imperial Household Office was organized under The Imperial Household Law of 1947 along with the current The Constitution of Japan which was adopted in the post-war period____________________
Imperial Household Ministry was organized under the Imperial House Law of 1889 and the Meiji Constitution which was proclaimed in the course of the Meiji Restoration____________________
Ministry of the Imperial Household was organized under the Taiho Code, which was adopted in during the reign of Emperor Monmu.