Having just rewatched this, I think the most likely areas where the two version differ is with the submarine captain scenes. For the most part, you could replace the scenes of the American military and sub commander with Japanese military doing the same thing. There is even a Japanese "leader" of some kind (I think he's presented as Peggy Neal's editor, but that is all from dialogue so it could be a creation of editing), and he might instead have the role of a submarine commander in the Japanese version. That's my guess at least!