Mmmmm....well...perhaps not. But there would have been war. Were the Japanese emboldened by the antics of Hitler? Perhaps. But they had been well prepared to unleash hell after years and years of, what they perceived to be, abuse at the hands of the US. Probably starting with Teddy Roosevelt.
Also, the Japanese were emboldened by their victories in the Russo-Japanese war. After they managed to wipe out the entire Russian fleet using their naval power, they thought they could use the same strategy to deal with other Western powers that were vexxing them, especially the U.S.
In fact, the sneak attack on Pearl Harbor was basically just an attempted re-enactment of the Japanese sneak attack on Port Arthur that started the Russo-Japanese war, except that this time the Japanese had naval aviation as the backbone of the attack instead of torpedo boats.