Is it possible for Sadao to have developed a soft corner for the Americans after having spent time in America for his studies?

The answer would be a resounding no because the conflict that Sadao faces in trying to save the American prisoner of war and at the same time, trying to hold on to his patriotic fervour is far more complicated than that. ​The dilemma that Sadao faced was a clash between his duties as a doctor and that as a citizen of a particular nation. He comments that if the man was whole, uninjured, then he would not have faced any difficulty in turning him over to the police. As a nation at war, America was the common enemy of all Japanese citizens and the enemy soldier was only a common fellow. However, the fact that he was wounded complicated this issue because as a doctor, Sadao had taken the oath to put those duties first and serve mankind as a whole, without any discriminations on the basis of nationality. As a wounded person, the American soldier was at his mercy and he found it impossible to refuse medical assistance in such a case.