1935 Japanese Postcards Commemorative for "The Exposition of the Philippines Circumstances"
http://www.ebay.com/itm/Vintage-Japanese-Postcards-Philippines-Exposition-Manuel-L-Quezon-antique-rare-/112002645627?hash=item1a13e0be7b
Since the early Meiji Era, roughly speaking, there had been two doctrines of foreign policies in Japan,"Nanshin Ron" ( Southern Expansion Doctrine ) & "Hokushin Ron" (Northern Expansion Doctrine).
After the Wars with China and Russia, Japan's basic national policy became " The Northern Expansion Doctrine", and "The Southern" remained as a non-governmental and non-mainstream, civilian based foreign policy.
In the 1930's, when the Commonwealth of the Philippines was about to be established, many Japanese intellectuals began to recognize the necessity of interactions with the Philippines, and made several associations to promote it.
At that time, their policy advocated mostly economic advance and was not linked to Japan's territorial expansion and military advance.
Also , it was on civilian basis and still not Japan's mainstream foreign policy.
But, later soon, Japan officially started towards "The Southern" , that held a military aspect, as we all know.