Decoration of medals takes place (Japan), pursuant to the Ordinance of the Imperial Nobility implemented pre-war, to mark their coming of age or marriage: the Grand Cordon of the Supreme Order of the Chrysanthemum for Imperial Princes; the First Order of the Precious Crown (currently, the Grand Cordon of the Order of the Precious Crown) to Consorts of Imperial Princes and Imperial Princesses; Grand Cordon of the Order of the Rising Sun with Paulownia Flower (currently, the Grand Cordon of the Order of the Paulownia Flowers) to Princes; and the Order of the Second Class of the Precious Crown (currently, the Order of the Precious Crown, Peony) to Consorts of Princes and Princesses.
戦前の皇族身位令に準じて勲章(日本)が行われ、戦後でも、成年に達したときや結婚の際に、親王には大勲位菊花大綬章が授けられ、親王妃・内親王には勲一等宝冠章（現、宝冠大綬章）が、王には勲一等旭日桐花大綬章（現、桐花大綬章）が、王妃・女王には勲二等宝冠章（現、宝冠牡丹章）が授けられる。