In 1945, at the end of the war, the Imperial Household Ministry had became a big organization with 13 extra-ministerial bureaus such as Naidaijin-fu (Minister of Interior's Office), ceremonial staff, Outadokoro (Imperial Poetry Bureau), Imperial Household Museum, Imperial Forestry Bureau, and The Gakushuin School Corporation, and Imperial Household Agency Kyoto Office as well as one Secretariat, two offices, eight bureaus, and two departments, and had more than 6.200 employees.
1945年（昭和20年）の終戦の際には、宮内省は、1官房2職8寮2局のほか、内大臣府、掌典職、御歌所、帝室博物館、帝室林野局、学習院など13の外局と京都事務所を持ち、職員6,200人余を擁する大きな組織となっていた。