A. Japan saw the United States as a threat to the continuation of their strategy.
B. Drang Nach Osten. what you state was the excuse Hitler used.
Backward.
Hitler's excuse to the West was that his people needed land because they were unconscionably crowded into the narrow borders imposed on them by the victors of WWI.
At home, his argument was restoring the original boundaries of the German Empire, to undo the humiliation of Versailles and to reassert German greatness.
And that was his motivation - Hitler wasn't driven by a desire for natural resources, he was driven by his ideological demons.