The Empire of Japan did declare war before the attack. but the top leaders at the time saw the telegram.. and didnt send it to the president.. they knew of the attack and waited... the final page of the ultimatum, which was the DoW was not released until after the war.. and by that time, no one cared. Japan did rightfully declare war on the US before the attack. but the government kept it from the people. so they could accomplish their own goals
Is your tinfoil hat getting tight yet?