noun
Imperial Palace guard
Official title for a member of the Imperial Guard, responsible for the security of the Imperial Palace and related facilities.
皇宮護衛官は、皇居の警備にあたる。
Imperial Palace guards are responsible for the security of the Imperial Palace.
皇宮警察 is the Imperial Guard Headquarters, the organization to which 皇宮護衛官 belong.
Compound of 皇宮 (imperial palace) + 護衛 (guard, escort) + 官 (official).