Dictionary/皇室こうしつKoushitsu皇室 (Koushitsu) is a Japanese noun meaning “Imperial household”.MeaningsnounImperial householdKanji in 皇室皇emperor室roomRelated words室room教室classroom研究室laboratory室長section chief密室locked room皇帝emperor病室sickroom寝室bedroom上皇retired emperor室内indoor会議室conference room個室single (room)