Chugushiki was the office which belonged to Nakatsukasasho (Ministry of Central Affairs) and was in charge of the consort's household affairs under the Ritsuryo system (a system of centralized government based on the ritsuryo code).
中宮職（ちゅうぐうしき）は、律令制において中務省に属して后妃に関わる事務などを扱う役所。