WW2 as a subject of inquiry in Japanese animation?

I'd like to hear someone explore the fan interest in World War II, but rather how it crosses over into Japanese animation and graphic novels. I have noticed that there has been a growing presence of WW2-inspired anime and manga such as Kantai Collection and Girls und Panzer. I think it would be worth discussing the Japanese view towards their own role in WW2 and how this view has led to a different handling of the subject in Japan. In many anime and manga, one can see that there is a hesitation to portray Axis-aligned countries strictly as villains. Often times, I have seen Axis-countries being portrayed from a neutral position like in Girls und Panzer and Axis Powers Hetalia, or WW2-esque settings being entirely re-written and replaced by alternate settings like in Strike Witches or Sora no Woto.