Ninigi no Mikoto, grandson of Amaterasu, descends from heaven onto Mount Takachiho in Kyushu, sent to rule the newly transferred land and carrying the mirror, the sword and the curved jewel — the three regalia. His great-grandson is Jimmu, counted as the first emperor. Between 1890 and 1945 this genealogy was taught in Japanese schools as historical fact, the national foundation day of 11 February was calculated from it, and the doctrine of an unbroken imperial line descended from the sun goddess was central to state ideology and to the war. The occupation required the Emperor's 1946 statement disavowing the claim to divinity. The regalia themselves still exist as objects: the mirror is held at Ise, the sword at Atsuta, and replicas travel with the emperor. No one alive has seen the mirror or the sword; they were presented, wrapped and unopened, at the 2019 accession, which was performed and paid for in a way that has been challenged in Japanese courts as a breach of constitutional separation.