Three distinct lines of tradition point to the near peninsula or the west coast of Japan as the "Heaven" whence descended the tribe which finally grew to be dominant. The islands of Tsushima and Iki were the stepping-stones of the migration out of which rose what may be called the southern or Tsukushi cycle of legend, Tsukushi being the ancient name of Kiushiu. Idzumo is the holy land whence issued the second stream of tradition. The third course of myth and legend leads us into Yamato, whence we behold the conquest of the Mikado's home-land and the extension of his name and influence into the regions east of the Hakoné Mountains, including the great plain of Yedo, where modern Tōkiō now stands. We shall take the term "Yamato" as the synonym of the prehistoric but discernible beginnings of national life. It represents the seat of the tribe whose valor and genius ultimately produced the Mikado system. It was through this house or tribe that Japanese history took form. The reverence for the ruler long afterward entitled "Son of Heaven" is the strongest force in the national history. The spirit and prowess of these early conquerors have left an indelible impress upon the language and the mind of the nation in the phrase Yamato Damashi--the spirit of (Divine and unconquerable) Japan. The story of the conquest of the land, in its many phases, recalls that of the Aryans in India, of the Hebrews in Canaan, of the Romans in Europe and of the Germanic races in North America. The Yamato men gradually advanced to conquest under the impulse, as they believed, of a divine command.[9] They were sent from Takama-no-hara, the High Plain of Heaven. Theirs was the war, of men with a nobler creed, having agriculture and a feudal system of organization which furnished resources for long campaigns, against hunters and fishermen. They had improved artillery and used iron against stone. Yet they conquered and pacified not only by superior strategy, tactics, weapons and valor, but also by advanced fetiches and dogma. They captured the religion of their enemies as well as their bodies, lands and resources. They claimed that their ancestors were from Heaven, that the Sun was their kinswoman and that their chief, or Mikado, was vicegerent of the Heavenly gods, but that those whom they conquered were earth-born or sprung from the terrestrial divinities. Mikadoism the Heart of Shintō.