Together with the climate, the race stands forth as an indispensable factor in the promotion of its civilisation. Then to what race do the Japanese belong? Can all the people of Japan be homogeneously comprised under a single racial appellation, or must they be treated as an agglomeration of several different races? Are the Japanese, or the bulk at least of the Japanese, indigenous or immigrant? If the Japanese are an immigrant race, then whence did they originate, and what is the probable date of their immigration into this country? What race, if not the Japanese, are the aborigines of these islands? Questions of this kind, and others of a similar nature have stood waiting for solution these many years! But none of them has yet been completely answered, though attempts have been made not only by a large number of native investigators, professional as well as amateur, but also by not a few foreign philologists and archæologists, who were tolerably well-versed in things Japanese. Recently many interesting excavations of ancient tombs and historical sites have been made, and various remains pertaining to the old inhabitants of the islands have been submitted to the speculative scrutiny of specialists. They have served, however, rather to lead one to deeper, more obstinate, scepticism, than to shed light on those doubtful and tentative answers and indecisive controversies. It is very much to be regretted that we have no authentic record of the early immigration into Japan from the pen of a contemporaneous writer, so that we could thereby verify the interpretations assigned to the remains found in the ancient tombs. This is to be attributed to the lack of the use of written characters among the aboriginal people, as well as to the illiteracy of the early immigrants. If we had as remains of prehistoric Japan such valuable historic materials as have been excavated in Europe and Western Asia, we should have been able to deduce the history of its early ages with a tolerable degree of certainty from the remains themselves, independently of any documental evidence. Unfortunately, however, in this respect also, our prehistoric remains consist only of a few kinds of earthenware, mostly with very simple patterns on them, and some other kinds of primitive utensils of daily use, such as saddles, bridles, sword-blades, and the like. Huge tombstones are sometimes found, but they have no such inscriptions as we see on many Greek sarcophagi, being provided only with a few unintelligible, perhaps meaningless, scratches. As to the primitive Japanese ornaments, very few historical data can be gathered from them, for they are generally beads of very simple design, and of three or four different shapes. It is quite hopeless to think that we should ever be able to dig out a single dwelling, not to speak of a whole palace, village, or town, on any Japanese historical site, since no stone, brick or other durable material was ever used in the construction of buildings. As our stock of reliable, authentic information concerning our origins is so scanty, it is at the disposal of any one to manufacture whatever hypothesis he chooses, however wild a speculation it be, and sustain it as long as he likes against any antagonist, not by proving it positively and convincingly, but by pointing out the impossibility of the opposing hypothesis, so that the present state of archæological research in Japan may be summed up as an intellectual skirmish carried on by regular as well as by irregular militant scholars. Therefore, in spite of the fact that Japan now abounds in ethnologists, big and small, each fashioning some new hypothesis every day, there can be perceived only a very slow progress in the solution of the fundamental question, "Who are the Japanese?" We are almost at a loss to decide to which assertion we can most agreeably give our countenance with the least risk of receiving an immediate setback. So I shall be content to state here only those hypotheses, which may be considered comparatively safe, although they may not rise far above the level of conjecture.
The only thing virtually agreed to by all investigators engaged in ethnological inquiry concerning Japan, is that the Ainu is the aboriginal race, and that the Japanese so called belongs to a stock different from the Ainu. Once for a time there prevailed a hypothesis that there was a people settled in this country previous to the coming of the Ainu, who must be therefore an immigrant race. It is said that the Ainu called this people by the name of Koropokkuru. But very little indeed is known about these supposed autochthons, except that they were very small in stature, and that this pigmy race receded and vanished before the advancing Ainu. The theory had its foundation only in some Ainu legends, and was not supported by any archæological remains, which could be attributed, not to the Ainu, but to a special pigmy race only. Much reliance, therefore, could not be placed upon this hypothesis, or rather vague suggestion, and it was speedily dropped. Still it is not yet decided whether the Ainu is the real autochthon in Japan or an immigrant from some quarter outside the Empire. Most of the Ainologists are rather inclined to the opinion that the Ainu himself is also an immigrant, though no other race prior to him had settled in Japan. But then there arises among scholars another disagreement, that about the original home of the race. Some hold the opinion that the Ainu came over to the Japanese islands from the north or the northwest, that is, from some coastal region of the Asiatic continent on the other side of the Sea of Japan. And there are not a few, too, who not only trace the origin of the race into the heart of Asia, but even go so far as to say that the Ainu came from the same cradle as the Caucasian race. Some go still further and localise the origin of the race more minutely, identifying the race as a branch of the protonordic race, akin to the modern Scandinavians. On the other hand there is a certain number of ethnologists, who entertain the opinion that the Ainu immigrated into Japan, from the south, and not from the north; but no specified locality in the south has yet been designated as the original home of the race. The last hypothesis seems, however, not to be untenable, when we consider that in historic times the Japanese drove the Ainu more and more northward, till the latter lost entirely its foothold in Hon-to, and was at last hemmed in within a small area in the island of Hokkaido and the adjacent islets. From this fact it can be imagined with some probability that the same direction of expansion might have been taken by the Ainu also in prehistoric times. The custom of tattooing, also, which can be very seldom seen among the northern Asiatic tribes, suggests to us, though faintly, the possibility of the existence of a certain kind of affinity between the Ainu and the inhabitants of the tropical regions. On the other hand, if we turn our attention to the outward features of the Ainu race, and remember that races very much resembling the Ainu are still lingering on the northeastern shores of Asia, the immigration from the northwest becomes not utterly improbable. Even the supposition that the Ainu belongs to the Aryan stock cannot be rejected as quite a worthless speculation, if the paleness of the complexion, the shape of the skull, and some other characteristic features be taken into account. In short, the ethnological uncertainty regarding the Ainu race is, in all likelihood, one of the principal causes of the obscurity concerning Japanese race-origins. Sometime in the future, I have no doubt, the racial riddle concerning the Ainu will be cleared from the haze in which it is now shrouded. Here, however, especially as I am not now treating of ethnology, I will avoid forming any hasty conclusion, and leave the question as it stands.
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