It is said that the reason was as follows: At that time, Yi Dynasty Korea was busy for combating pressure from the north by Kokin, and therefore, did not dispute or could not afford to dispute the system change on the Japan side.
その理由としては当時、李氏朝鮮は北方から後金の圧迫に忙殺されていたため、日本側の制度変更にあえて異論を挟まなかった、あるいは挟む余裕がなかったとされる。