They have been symbols of the imperial family. These three are a sword named “Kusanagi-no-Tsurugi” enshrined in Atsuta Shrine, a mirror named “Yata-no-Kagami” enshrined in Ise Shrine, and a curved jewel named “Yasakani-no-Magatama” enshrined in the Imperial Palace. According to the myth, the Sun Goddess Amaterasu gave these to her grandson Ninigi-no-Mikoto when she ordered him to descend to Earth and rule it.