Archaic honorific title for the emperor, used in classical or historical contexts. Not used in modern Japanese.
十善の君は、いにしえの帝を指す言葉である。
Jūzen no Kimi is a term that refers to the emperors of ancient times.
Literally 'lord of the ten virtues', referring to the ten good deeds in Buddhist teaching. The exact historical derivation is uncertain, but it was used as an honorific for the emperor in classical Japanese.