We hardly need to reiterate that the Japanese-California question--the main theme of this book--is only a part of the vast problem which confronts America and Japan. The present world tendency is to bind increasingly all parts of the world into one. The process of civilization, like a revolving body, exerts centrifugal and centripetal force and gradually unifies all civilizations into a cohesive system. At present there are two centers of such forces, one in the East and another in the West, each trying to influence the other. By virtue of being the youngest and the most vigorous representatives of the two spheres, Japan and America, respectively, are naturally destined to shoulder together the great task of harmonizing and unifying these two great currents of human achievement. The task involves, from its gigantic nature, a great many difficulties and risks of which the present California issue is certainly one. All these difficulties must be squarely met and surmounted with courage and wisdom, since to shrink from the job is to commit the future relationship of the East and West to the cruel law of natural selection. It is, however, generally true that the perfect understanding of the common aim settles the incidental difficulties arising in the process. This is particularly true in the case of the California-Japanese question, which is a partial issue of the great undertaking between America and Japan. The core of the California problem, our study has shown, is the question of assimilability of the Japanese. But what is the assimilation but the approach to the common standard of culture and ideals? The approach to the common standard of culture and ideals between the peoples of Asia and Europe and America is precisely the task in which Japan and the United States are engaged in unison. Herein is the explanation of our earlier assertion that the California problem is a miniature form of the problem of the East and West. Herein also is the support of our contention that to accelerate the coöperative effort of America and Japan for mutual understanding is the only and the best method of bringing about the solution of the Japanese problem in California or elsewhere in the United States. We wish, therefore, to emphasize once more that the wisest policy to follow in the future for America and Japan is not foolishly to sharpen the edge of swords for imaginary race wars, which are absurd, but to devote themselves wisely to learning and appreciating each other's accomplishments and greatness, from which alone true friendship can arise. APPENDIX A [Illustration: _COMPARATIVE HEIGHT OF AMERICAN, JAPANESE-AMERICAN & JAPANESE CHILDREN_] [Illustration: _COMPARATIVE WEIGHT OF AMERICAN, JAPANESE-AMERICAN & JAPANESE CHILDREN_] APPENDIX B EXTRACTS FROM THE TREATY OF COMMERCE AND NAVIGATION AND PROTOCOL BETWEEN JAPAN AND THE UNITED STATES OF AMERICA, OF FEBRUARY 21, 1911.