This place commits the number one sin in my book...
The ethnicity does not match the food as advertised. This is my biggest pet peeve. I don't care how good the food tastes. If the owners are not the same as what it says on the door, all credibility might as well go out through it.
As a matter of fact, sometimes I go to these types place establishments and speak to them in Japanese (even though I'm not even Japanese myself), and they have no clue what I'm talking about. So, how authentic is that?!