In fact, the Kampaku had the right to inspect letters to the Emperor (more on this later); thus when there was political correspondence between the Emperor and Daijokan, the Kampaku was able to grasp and participate in its contents beforehand, giving him authority to control both the Emperor and the Daijokan without infringing upon the authority of the Emperor's edicts or the replies to them.
ただし、関白は内覧の権限（後述）を有しており、天皇と太政官の間の政治的なやりとりを行う際には関白が事前にその内容を把握・関与することで、天皇の勅命や勅答の権限を直接侵害することなく天皇・太政官双方を統制する権限を有したのである。