It is used for ceremonies and events, such as meetings of the Emperor/Empress with foreign sovereigns/foreign government dignitaries or receptions by the Emperor/Empress of Japanese government officials and private citizens who are visiting Kokyo.
主に、天皇・皇后が外国国家元首・外国政府要人と会見し、又は皇居を訪れた日本政府関係者及び民間人を引見する等の儀式並びに行事に使用される。