DRs Jane and TCB, do keep in mind that just because a tourist is Asian that does not mean they are Japanese....as far as language goes, Japanese and Korean sound almost identical...then of course you have Chinese, Vietnamese, Cambodian, etc, etc.
I could be wrong, (I was once

)but I cannot imagine Japanese tourists acting the way that you describe, particularly at the Pearl Harbor exhibit.
Sorry to keep going on about this, but a pet peeve with me is when people assume every Asian is Japanese or every Asian is Chinese when there are so many different Asian cultures, all unlike the other.