Whether the Ainu be autochthonous or immigrant, and whatever be the original home of the race, if immigrant at all, the hairy people, it is true, once spread all over these islands, not in Hon-to only, but even to the southern end of the island of Kyushu. This can be proved by the pottery excavated in the provinces of Satsuma and Ohsumi, and also by several geographical names in Kyushu, the etymological origin of which may best be traced to an Ainu source. As a matter of fact, the Ainu had been gradually driven northward, and the island of Kyushu wrested from their hands, before the dawn of the historical age, leaving perhaps here and there patches of tribesmen, who were too brave or not speedy enough to flee before the advancing conquerors. And those remnants, too, after a faint survival of some generations, were at last subdued, exterminated, or swallowed up among the multitudes of the surrounding victorious race or races. Thus Shikoku, the island of the four provinces, and the southwestern part of Hon-to were evacuated by the Ainu before the end of the prehistoric age. When the curtain rises on Japanese history, we find the Ainu fighting hard against the Japanese in the north of Hon-to. We have here designated the vanquishers of the Ainu, for the sake of convenience, simply by the name of Japanese. Were they the Japanese in the same sense as the word is understood by us now? Were the vanquishers a homogeneous people, or a heterogeneous one? If the Japanese were heterogeneous, who were the first comers among them? Who were the most prominent? All these are questions very hard to answer clearly. It is sometimes argued that we had only one stock of people in Japan besides the Ainu, and that that stock is the homogeneous Japanese. This view is not avowed openly by any scholar worthy of mention, for it is an undeniable fact that in the historical ages groups of immigrants, intentional as well as unintentional, happened to drift into Japan now and then, not only from Korea and China, but from the southern islands also, though not in great numbers, and the occurrence of migrations similar to those in historic ages cannot be absolutely denied to prehistoric times. Besides, any one who pays even but cursory attention to the physical features of the Japanese can easily discern that, besides those who might be regarded as of a genuine Korean or Chinese type, there are many among them who have a physiognomy quite different from either the Korean or the Chinese, though one might be at a loss to tell exactly whether the tincture of the Malayan, Polynesian, or Melanesian blood is predominant. In face of such diversity, too clear to be neglected, none would be bold enough to assert that the Japanese has been a homogeneous race from the beginning. Strangely enough, however, this evidently untenable conception still lies at the bottom of many historical hypotheses, which will be set right in the future.