The greatest reason for Japan's participation in the Triple Alliance lies in the fact that the three signatory powers, at this time of great change in the world situation, have the same position, the same interest, and entertain the same political views. China is not Japan's real enemy in the present incident. In reality Japan is fighting Britain and America. The first thing we are now required to do is to carry out our southward advance.

Quoted in "World order in historical perspective" - Page 308 - by Hans Kohn - 1942.