皇太子 こうたいし殿下 でんか
kōtaishidenka

Noun

1. His Imperial Highness the Crown Prince; His Royal Highness the Crown Prince

Honorific
そのオペラにはおそれ おうくも皇太子 こうたいし殿下 でんか夫妻 ふさい あし はこばれた。
sono operaniwa osore ōkumo kōtaishidenka gofusaiga ashio hakobareta.
The opera was graced with the august presence of the Crown Prince and Princess.