At first my impression was that this place seems like a simple Japanese restaurant, maybe Chinese or Korean operated. The price tag also way higher than the low quality Japanese food. I honestly did not have much expectation.
However, they seems authentic Japanese food. And as I order the katsu don, which I do to every Japanese restaurant I first visit, I found that their katsu don has been the best I have had for a long time. Maybe it is the way it was marinated that taste unique and gave it a kick. Not bad to be surprised by a random selection of restaurant. Happy.