However, it gradually came to refer to the children and younger brothers of Okimi (great king) of the Yamato sovereignty, and upon the establishment of the emperor, 皇子, the character of Miko, started to be used for the naming.
しかし、次第に大王(ヤマト王権)の子弟を指すようになり、天皇の成立とともに皇子の字があてられるようになった。