Anime is considerably different than the comic books. I think overall they respect the idea of things having a beginning and end far more than the western books.
The bomb I think had a huge effect on their style. Their culture of course too.
But just look at DBZ or any of the numerous scifi anime and tell me different. I don't think you can.
The atomic bombing, bad as it was for them, had a profound effect on them that lasts to this very day.
Who knows if their fiction would have ever included Godzilla or DBZ without their final confrontation with the US in WWII.
They surely would have had a different perspective of things now if they had won or got the US to quit fighting.