Answer:
Pathos works best in President Roosevelt’s speech because the words he selects present an emotional appeal to citizens who are frightened by the attacks and want to avenge the deaths of their fellow Americans. He uses phrases such as “the very life and safety of our Nation,” “the American people in their righteous might will win,” and “the unbounding determination of our people.”
The ethos in the Japanese declaration of war is a strong choice. Hirohito aligns himself with former emperors who believed in world peace:
We, by grace of heaven, Emperor of Japan, seated on the Throne of a line unbroken for ages eternal, enjoin upon ye, Our loyal and brave subjects: