His Imperial Highness the Crown Prince
Honorific title used for the crown prince of Japan. The term is specific to the Japanese imperial family and is used in formal contexts.
His Imperial Highness the Crown Prince returned to Japan today from his overseas visit.
His Imperial Highness the Crown Prince also graced the ceremony with his presence.
Compound of 皇太子 (crown prince) and 殿下 (honorific suffix for royalty). The term is a formal title used exclusively for the Japanese crown prince.