The ceremony that the Emperor announces to Amaterasu Omikami, the gods of heaven and earth and successive Emperors, enshrined in Kashikodokoro, Korei-den and shinden (they are called the Three Shrines in the Imperial Court) that he is going to hold Sokui no rei (to inform gods is called hokoku).
天皇が賢所・皇霊殿・神殿（合わせて宮中三殿と呼ぶ）に祀られている天照大神・天神地祇・歴代の天皇に即位の礼を行うことを告げる（神々に告げることを奉告という）儀式