Oh, nonsense. Did you forget about that little thing called the Greater East Asia Co-Prosperity Sphere? WWI wasn't a world war. WWII was, and HItler wasn't as much a direct threat to us as Tojo was.
Japanese expansion was in part enabled because of the inability of the European powers to maintain colonial presense following WWI. How much worse would that have been, had France and GB withdrawn totally from Asia following a defeat by the Central powers? If a revived Ottoman empire still straddled the M.E.?
Japanese aggression was inspired and equipped after America foolishly and greedily forced Japan to trade with us in the 1850's.
Had we left them alone, they might still be using bows and arrows.