until the meiji period, the sacred treasures were dedicated to kami in the main hall for 20 years, and then kept in the treasure house for another 20 years to serve as a model for the manufacturing of sacred treasures in later years, and then burned or buried in the shrine grounds. after the opening of the , the old sacred treasures removed from the treasure house exhibited at special exhibitions in the jingu chokokan museum and other museums. recently, from october 2015 to october 2016, the old sugari no ontachi, which had been replaced, was displayed together with 9 swords including tamamaki no ontachi at jingu chokokan museum. also, old sacred treasures removed from the treasure house may be granted as an imperial gift to other shrines.