Established during the reign of Emperor Keikō, Atsuta Shrine was founded to house the Kusanagi no Tsurugi, a legendary sword. The shrine's Bunkaden, or treasure hall, houses over 4,000 relics, which include 174 Important Cultural Properties and the Kusanagi no Tsurugi, the ancient sword that is considered one of the Three Sacred Treasures of Japan. this swoard is central to the Shinto significance of Atsuta Shrine. This sacred sword is understood to be a gift from Amaterasu Ōmikami. This unique object has represented the authority and stature of Japan's emperors since time immemorial.