According to "Keikoku Taiten" ("Gyeongguk daejeon" in Korean, a Complete Code of Laws), naikan in the Yi Dynasty of Korea was organized in the following way: Pin (嬪, a first grade ranking), Kui-in (貴人, the associated first grade ranking), Soi (昭儀, a second grade ranking), Sugi (淑儀, the associated second grade ranking), Soyon (昭容, a third grade ranking), Sugyon (淑容, the associated third grade ranking), Sowon (昭媛, a forth grade ranking) and Suguon (淑媛, the associated forth grade ranking).
李氏朝鮮における内官は、『経国大典』によると嬪（、ピン、正一品）・貴人（、クィイン、従一品）・昭儀（、ソイ、正二品）・淑儀（、スギ、従二品）・昭容（、ソヨン、正三品）・淑容（、スギョン、従三品）・昭媛（、ソウォン、正四品）・淑媛（、スグォン、従四品）などであった。