Getting the US involved in WW2 resulted in the ultimate downfall of both Germany and Japan...and Japan paid a pretty stiff price for their attack.
They had no choice but to attack us. Roosevelt baited them into it.
It still amazes me how badly they screwed that. Well actually, considering the religious fantasism of the Japanese armed forces, they seriously thought they were divinely invincible.
They could have bypassed the Philippines, took the Dutch East Indies from bases in Indochina, guaranteed safe passage for all American ships to keep us at bay, and bought themselves 3 years