I cut my sushi teeth in Japan traveling amongst the blue suit brigade, enjoying saki drenched evenings in Rapongi.
Mizu Sushi in Cranford, NJ is a worthy little place. It is warm and informal. One caution, if you need an Asahi ultra dry or Kirin, be sure to bring it with you. Liquor licensing in NJ is out of reach for little places like this.
The rolls are delicious and the tempura is as good as it gets outside of Kyoto.
Stop in when you are looking for a light meal.