According to Tsuneyasu TAKEDA the Imperial Household Agency defines emperors, empresses, princess from out of 51 Imperial members of 11 Miyake who ceased to be members of the Imperial Family in 1947, as 'descendants of the former Imperial Family,' and the head of the Miyake were called 'the former Imperial Family.'
竹田恒泰によれば、宮内庁は1947年に皇籍離脱した11宮家51人の王、王妃、女王を「元皇族」、その中で当時宮家の当主だった王を「旧皇族」と定義しているという。