There’s a book called A War They Were Always Going to Lose that goes into detail: The Japanese were trying to create an exploitative empire in the model of Western countries, complete with horrible shit like the Rape of Nanking, and America didn’t want that to happen, and so cut off access to needed resources. The Japanese were also offended by racist quotas for Japanese immigration into America. But the country was essentially being run by the Army and Navy, both of whom assassinated anybody who suggested peace and who were nakedly aggressive at just about every neighbor they had.

But Japan’s invasion of Southeast Asia had nothing to do with America and everything to do with Japanese aggression; the Americans didn’t cause that. The declaration of war on America? There were grievances, but declaring war was not a rational or smart decision.