During Kongokai-kegyo and Taizokai-kegyo, the principal object of worship is Kongokai Mandala, and during Taizokai-shogyo, Taizo Mandala is the object of worship.
金剛界正行・胎蔵界加行の間は金剛界曼荼羅を、胎蔵界正行には胎蔵曼荼羅を本尊とする。