When the former Imperial House Law was issued, the capacity for the empress became one, the title 'Chugu' was officially abolished to be unified as 'Kogo.'
明治22年（1889年）の旧皇室典範の制定で、皇后の定員が1名となるとともに、正式に「中宮」の称号は廃止され、皇后に統一された。