Let's say that despite the Japanese invasion of Manchuria and French Indochina the United States for some reason does not employee the oil embargo which led to the start of the Pacific War. The Philippines were finally given their independence from America in the 1920s after a stronger referendum and are no longer a territory of the United States, but a free republic. Then let's say Japan is able to encapsulate the whole of eastern China, the free Philippines, and is able to secure the Dutch East Indies. Having obtained most of the resources it needs to form colonies the Japanese do not attack the British Empire or the United States. How much longer will Japan last as a power in the region?