This seems like an updated version of those Medieval Times restaurants, where knights have a go at each other in an arena while spectators/diners look on.
The spin with this one is that it's a feudal Japanese Ninja castle: Hibachi assassin?
Seems silly--but it's pretty looking. The big tell would be how good the food is.
As an aside, I wanted to post some images of the Ninja restaurant. While doing an image search for 'ninja restaurant NY' here are two random images that were retrieved: