こうたいしでんか
His Imperial Highness the Crown Prince; His Royal Highness the Crown Prince
Noun
そのオペラにはおそれ多おおくも皇太子殿下こうたいしでんかご夫妻ふさいが足あしを運はこばれた。
The opera was graced with the august presence of the Crown Prince and Princess.