I ate and drank here on a Friday night around 10 PM. The prices are maybe a little high for what you get, but you are also paying for atmosphere and authenticity. The cooks and servers are Japanese - all that's missing are call buttons and privacy screens at the tables.
We ordered chicken nanban, kimchi udon, ebi mayo and salted mackerel, and were thoroughly impressed by all of them. I got full before I got a chance to try their okonomiyaki sadly, but I was very happy with the food.
The service was attentive and warm - rather un-Japanese to try and upsell the tasting menu and specialty cocktails, but I can't blame them.
Music was loud repetitive house music and I heard some Parov Stellar. Whoa.