I would really like to give Shibuya four and a half stars because its over priced--but that's Vegas.  Otherwise the food was excellent.  Every bite of my seared Akami tuna was blissful.  The tuna was in a nice sweet sauce that ended with a spicy finish.  We also tried the Sushi (Rainbow roll) which was also fresh and exceeded my expectations.  We didn't try any Sake, though their menu claims to have the largest selection of sake on this side of the Pacific, but my martini, made with Japanese alcohol, was excellent.\n\nI also enjoyed the atmosphere.  The restaurant is divided into intimate sections by floor-to-ceiling wooden dividers reminiscent of cascading water which leaves the space feeling open yet private.  As is typical of all over-priced Vegas restaurants, there is a hip, smooth vibe and plenty of chicly dressed patrons.  Service was above average.