It could just be a case of 'over-running an idea' though, someone comes up with the thought "Why not make a spaceship out of the Yamato's Hull?", which is great, and then they stretch the whole WW2 metaphor to beyond breaking point in trying to orbit everything around the central 'character' of the thing. In situations like that, whilst the bias of the creator certainly shows, it's not really done to make a statement, it's more made out of ignorance to the whole picture. There are certainly plenty of Hollywood produced shows that suffer from exactly the same disease.
Star Trek TOS, for example, tended to only use American vessel names, (though that changed in TNG with the Yamato being the Enterprise's sister ship) or the fact that every officer in the Imperial Navy in Star Wars happened to speak with a very British accent, partly because we are good at bad guys, but it's been hinted more than once that the merging of British and the Empire may also have been subconciously based on our own reputation in the US.