In ancient times, the eldest daughters of emperors were called as Genkoshu (e.g., the eldest daughter of Liu Pang was called "Lu (or Lo in Japanese) Genkoshu," 魯元公主, or the Genkoshu given the land in Lu).
古くは皇帝の長女を元公主（げんこうしゅ）と呼んだ（例：魯元公主（劉邦の長女））。