The building has a unique structure in that the height of the principal image and the Eternal Light in the inner chamber are at the same height of the visitors in the central chamber and it is known as Tendai-zukuri or Chudo-zukuri, which is a characteristic of Tendai Buddhist temples.
内陣の本尊・不滅の法灯と中陣の参詣者の高さが同じという珍しい構造になっており、これを天台造又は中堂造と呼ばれ、天台仏堂の特色を示している。