ご称号とお代替わりの基本用語 English Titles and Basic words relating to the Imperial Succession 上皇陛下 Jōkō Heika, His Majesty the Emperor Emeritus 上皇后陛下 Jōkōgō Heika, Her Majesty the Empress Emerita 皇嗣殿下 Kōshi Denka, His Imperial Highness the Crown Prince 皇嗣妃殿下 K …