Therefore, Shikibu-Kyo, the Secretary of Shikibu-sho, was recognized as an important post, which established a convention that the Imperial Prince with a rank equivalent to or higher than Shihon (the fourth rank of Imperial Princes' rank) was appointed to the post since 872.
そのために長官である式部卿は重要な役とされ、弘仁3年より四品以上の親王が任ぜられる慣例ができあがっていった。