Are our theories wrong? Is Japan an exception? Are our facts correct? We instinctively feel that something is at fault. We are not satisfied with the usual explanation of the recent history of Japan. We are perhaps ready to concede that "the rejection of the old and the adoption of Western civilization" is the best statement whereby to account for the new power of Japan and her new position among the nations, but when we stop to think, we ask whether we have thus explained that for which we are seeking an explanation? Do not the questions still remain--Why did the Japanese so suddenly abandon Oriental for Occidental civilization? And what mental and other traits enabled a people who, according to the supposition, were far from civilized, so suddenly to grasp and wield a civilization quite alien in character and superior to their own; a civilization ripened after millenniums of development of the Aryan race? And how far, as a matter of fact, has this assimilation gone? Not until these questions are really answered has the explanation been found, So that, after all, the prime cause which we must seek is not to be found in the external environment, but rather in the internal endowment. An effort to understand the ancient history of Japan encounters the same problem as that raised by her modern history. What mental characteristics led the Japanese a thousand years ago so to absorb the Chinese civilization, philosophy, and language that their own suffered a permanent arrest? What religious traits led them so to take on a religion from China and India that their own native religion never passed beyond the most primitive development, either in doctrine, in ethics, in ritual, or in organization? On the other hand, what mental characteristics enabled them to preserve their national independence and so to modify everything brought from abroad, from the words of the new language to the philosophy of the new religions, that Japanese civilization, language, and religion are markedly distinct from the Chinese? Why is it that, though the Japanese so fell under the bondage of the Chinese language as permanently to enslave and dwarf their own beautiful tongue, expressing the dominant thought of every sentence with characters (ideographs) borrowed from China, yet at the same time so transformed what they borrowed that no Chinaman can read and understand a Japanese book or newspaper?