The are the imperial regalia of Japan and consist of the sword , the mirror , and the jewel . They represent the three primary virtues: valour (the sword), wisdom (the mirror), and benevolence (the jewel). The actual historical status of these legendary treasures is unknown as they are intentionally kept from public view to symbolize authority. Legend According to legend, these treasures were brought to Earth by Ninigi-no-Mikoto, legendary ancestor of the Japanese imperial line, when his grandmother, the sun goddess Amaterasu, sent him to pacify Japan. These treasures were eventually said to be passed down to Emperor Jimmu, who was the first Emperor of Japan and was also Ninigi's great-grandson. Traditionally, they were a symbol of the emperor's divinity as a descendant of Amaterasu, confirming his legitimacy as paramount ruler of Japan. When Amaterasu hid in a cave from her brother Susanoo-no-Mikoto, thus plunging the world in darkness, the goddess Ame-no-Uzume-no-Mikoto hung the mirror and jewels outside the cave and lured her out of the cave, at which point she saw her own reflection and was startled enough that the gods could extract her. Susanoo later presented the sword Kusanagi to Amaterasu as a token of apology; he had obtained it from the body of an eight-headed serpent, Yamata no Orochi. At the conclusion of the Genpei War in 1185, the six-year-old Emperor Antoku and the Regalia were under the control of the Taira clan. They were present when the Taira were defeated by the rival Minamoto clan at the Battle of Dan-no-ura, which was fought on boats in the shallow Kanmon Straits. The child emperor's grandmother threw herself, the boy, the sword, and the jewel into the sea to avoid capture. The mirror was recovered, but according to the main account of the battle, a Minamoto soldier who tried to force open the box containing it was struck blind. The jewel was recovered shortly afterwards by divers, but the sword was lost. There are a number of medieval texts relating to the loss of the sword, which variously contended that a replica was forged afterwards, or that the lost sword itself was a replica, or the sword was returned to land by supernatural forces. The importance of the Imperial Regalia to Japan is evident from the declarations made by Emperor Hirohito to Kōichi Kido on 25 and 31 July 1945 at the end of World War II,