It is a very dangerous feat, of course, to determine any ethnological question solely from a philological standpoint. For the sake of argument, however, let us assume for a while the hypothesis that the main element in the Japanese race came over from the northern Asiatic continent on the opposite shore of the Sea of Japan, by way, perhaps, of the peninsula of Korea and the island of Tsushima, or across the Sea of Japan. The ethnologists who adopt this view assume that the Chinese must be excluded from the above body of immigrants, the Chinese who were doubtlessly a far more advanced people even in those ages than the other neighbouring races, and were destined to become the most influential benefactors of Japanese civilisation. If regarded from the linguistic point of view only, it may be not at all unnatural thus to exclude the Chinese blood from the veins of our forefathers. In order to do so, however, it would be necessary at the same time to presuppose that the Chinese never came into close contact with the forefathers of the Japanese while the latter were sojourning on the Asiatic continent. It is not, of course, impossible to suppose that the ancestors of the greater part of the Japanese came over into this country without touching China anywhere, because they might have come from eastern Siberia, northern Manchuria, or some other quarter, narrowly avoiding coming into contact with the Chinese, though, actually, it is not a very easy matter to imagine such a case. Let us, then, drop all idea of the Chinese, and suppose that that race can be put aside in our consideration of the prehistoric Japanese without glaring unnaturalness. Still the question remains unsettled, whether the bulk of our ancestors from the continent contained within it the ruling class, who gave a unity to the heterogeneous population of this Island Empire. One would say that a certain stock among many, who had their abode in northeastern Asia, might have become predominant over the kindred people of various stocks settled previously in Japan. And the cause of the predominance may be supposed to have been a decided advance in civilisation on the part of the chosen stock. That is to say, the tribe in question might have been already in the iron age with respect to its civilisation, while other tribes were still lingering in the neolithic age. But in order to sustain this supposition, it is necessary to premise another assumption that the predominant stock was comparatively late in coming over to Japan, and that it had already attained the civilisation of the iron age before its immigration into Japan while the other inferior tribes remained at a standstill in their civilisation after settling in our country. Such an assertion, however, cannot be deemed probable without admitting that there was a considerable interruption of communication between Japan and the Asiatic continent before the immigration of the predominant stock. Otherwise it