They further hold that when the Sun goddess detailed five Kami to form the suite of Ninigi, these Kami were entrusted with the ministerial duties originally discharged by them, and becoming the heads of five administrative departments, transmitted their offices to generation after generation of their descendants. Thus Koyane was the ancestor of the Nakatomi family who discharged the priestly duties of worship at the Court and recited the Purification Rituals; Futodama became the ancestor of the Imibe (or Imbe), a hereditary corporation whose members performed all offices connected with mourning and funerals; Usume became ancestress of the Sarume, whose duties were to perform dances in honour of the deities and to act as mediums of divine inspiration; Oshihi was the ancestor of the Otomo chief who led the Imperial troops, and Kume became the ancestor of the Kumebe, a hereditary corporation of palace guards. Further, they hold that whereas Ninigi and his five adjunct Kami all traced their lineage to the two producing Kami of the primal trinity, the special title of sovereignty conferred originally on the Sun goddess was transmitted by her to the Tenson (heavenly grandchild), Ninigi, the distinction of ruler and ruled being thus clearly defined. Finally they hold that Ninigi and these five adjunct Kami, though occupying different places in the national polity, had a common ancestor whom they jointly worshipped, thus forming an eternal union. ENGRAVING: ANCIENT CIVIL AND MILITARY HEAD-GEAR CHAPTER V ORIGIN OF THE JAPANESE NATION: HISTORICAL EVIDENCES IN considering the question of the origin of the Japanese nation four guides are available; namely, written annals, archaeological relics, physical features, and linguistic affinities. WRITTEN ANNALS The annals, that is to say, the Records and the Chronicles, speak of six peoples; namely, first, Izanagi and his fellow Kami, who, as shown above, may reasonably be identified with the original immigrants represented in the story of the so-called "birth" of the islands; secondly, Jimmu and his followers, who re-conquered the islands; thirdly, the Yemishi, who are identical with the modern Ainu; fourthly, the Kumaso; fifthly, the Sushen; and sixthly the Tsuchi-gumo (earth-spiders). By naming these six separately it is not intended to imply that they are necessarily different races: that remains to be decided. It will be convenient to begin with the Sushen. THE SUSHEN