Incidentally, there is a theory arguing that Uchitsuomi was created based on the government organization system in Korean peninsula on the ground that there were cases in Korean peninsula where Gaisobun SEN was appointed to Uchitsuomi in Gogureyo and the head of Sahirashiki (a governmental office in Baekje managing clerical works) was called 'Uchitsuomi sahei' in Baekje.
なお、朝鮮半島の高句麗でも泉蓋蘇文が内臣に任じられ、百済の佐平職の筆頭を「内臣佐平」と称した例がある事から、朝鮮半島の官制を参考にした説もある。