One of the best Japanese restaurants outside of Japan. Ask for any special sushi/sashimi options of the menu -- they may have something very nice. Also the Ohmi beef is amazing (but $) nocheap :))
Skip the sushi and go for speciality dishes such as the fake pastas made from seafood (uni cauliflowerpasta), uni risotto, & beef fois sukiyaki. Great Austrian dessert wine! Bad selection of teas.
The restaurant is inside Gagosian Gallery. Along with traditional sushi and entrees, you find some unique stuff like fishpasta. Desserts all have slight Japanese twist!