My friend, you don't show enough of the blade to add to the evaluation, but everything that you do show is not Japanese made. This is made by SOMEONE to look Japanese, but it's not close.
Now, there were occupied nations, Java being a famous one, who made swords for thier troops and intentionally, made them in Japanese style. The artwork on this one isn't quite as good as even those, but the tang looks similar to their work. So, it's possible this WAS a war sword, just not made by the Japanese. The problem is that there were, and are, many fakes/replicas being made, that it's not really possible to know.
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