also: おうじょ
noun
Refers specifically to a daughter of the Japanese emperor or a female member of the imperial family with that title. Not a general term for princess.
皇女殿下は公務で海外を訪問された。
Her Imperial Highness the Princess visited overseas on official duties.
その皇女は幼い頃から和
The imperial princess had been familiar with waka poetry since childhood.
Compound of 皇 (imperial) and 女 (woman/daughter). The reading こうじょ is the standard Sino-Japanese reading; おうじょ is an alternative reading that may reflect older or variant phonetic developments.