Yama Irving Pl. is the site of the original Yama. Go early or be prepared to wait in line -- no reservations taken at this branch.
When I went to Yama, we ordered a la carte for three people which turned out to be incredibly expensive. I ended up spending $50, but you could have a great meal for $20 if you order from the menu. The slices of fish were large and very fresh.
Although the service here is minimal and rushed, it's worth putting up with it for the best sushi in town!