In 1908, regulations for Ministry of the Imperial Household came into force based on Koshitsu-rei (the Imperial Families' Act) and the Imperial Household Minister was set up as an agency to make advices to the Emperor with full responsibility of the results (hohitsu) all the Imperial Household affairs.
1908年（明治41年）には、皇室令による宮内省官制が施行され、宮内大臣は皇室一切の事務につき天皇を輔弼する機関とされた。