Any Borough in particular in mind?
Personal fav of mine is Tokyo Steak on the LIE service road in Kew Gardens, Queens. It's almost a dive looking joint from the outside, Indian chefs on the inside along with the Japanese family that owns the place. Foods always great, I'm not a sushi guy but people I've brought there and have had sushi over the years have all agreed it's good stuff.
They aren't to "showy" but you'll leave happy and full. They also make some of the best Chicken Fried Rice I've had anywhere.