Anime / Manga - Historically accurate depiction of Scottish-American WWII pilots

He's not wearing a kilt.

There isn't any, at least if played straight. Japan really doesn't like remind itself of its warmongering ways, preferring to stick to the "anti-nuclear pacifists" image. Easier on the conscience.
You'll have a better chance at finding manga about the subject. I personally recommend Osamu Tezuka's "Adolf". It shows a realistic view on how it was living in Japan during the war for the civilians, which I found really interesting. It wasn't all "Emperor banzai" as you may had thought.