Since it was a necessary document for the Emperor to conduct Bunin (appointment of government post), there were many and very complicated manners for Omagaki such as how to write, how to fold, how to seal and so on, and Omagaki was created with extra care.
天皇が補任を行うために必要な文書であるため、大間書の書き方、折り方、封印方法など多くの作法が存在し、大変複雑であり、作成には慎重が期された。