Slitherine

I'm playing through the boot camp and all the Japanese units have American labels ,,Like Marines 41 and even the ships have names same as American destroyers.At least the units have icons to show they are Japanese

Pointing out the obvious: You're not actually playing against Japan in the tutorial but against a "sparring partner" which is american as well.
I presume the idea is that it's like in an actual bootcamp, where opponents are also "friendlies" which merely stand in as opponents.
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rezaf

Thank you rezaf You are right I didn't pick up on that.So in the real game they should be fine.Feel dumb not to realize it.Some times the answer is right in front of you and you miss it.