殿下

Noun

 * 1) Your Highness; His Highness; Her Highness

Noun

 * 1)  down the steps to the imperial palaces where the emperor's relatives live, looking up
 * 2)  Your Highness; His Highness; Her Highness
 * 1)  Your Highness; His Highness; Her Highness

Usage notes
A form of address with various uses:
 * Under the system, for the  and the.
 * After the Meiji era, for all members of the imperial family except the Emperor and Empresses are addressed as instead.
 * After the Heian period, also for, and.
 * For foreign kings, queens and sovereign princes.