As I child I stayed home one day from school and watched an old war movie. I remember this, an American was over seas during the war with Japan. He had an operation on his eyes to appear asian and to infiltrate. He was identified by a Japanese man who recognised the way he ran because this guy had gone to college with him in the states. His running style was identifiable because he had been a famous running back at their shared college. This is all I've got except that the movie was probably made in the 50s.Whats it's name ?

I believe it's First Yank Into Tokyo (1945).
Just happened to be browsing my TV guide and saw it there.