Since HATA no Kawakatsu is said to have played an important role as an advisor to Prince Shotoku and had a close tie with royalty, articles in connection with the Prince and gifts from royalty are stored here with great care.
秦河勝は一説に聖徳太子の参謀として活躍したといわれ、皇族との関係も深いだけに、寺には太子ゆかりの御遺品や皇族からの賜り物が、大切に多く奉られている。