Another gem tucked away in a relatively unassuming plaza (well, unless you're counting boisterous neighbor Raku). Your only clue from the outside to the Tokyo zen that awaits you inside: a long thin slab of window perched just above eye level...
Inside, cool light upon a beautiful wood bar with several chefs/attendants poised yet working continuously. A very traditional meal in a refined setting - we went with the Kabuto course, seated at the far end of the bar with a perfect view of the Edomae style attention to detail.
The cooked/grilled dishes were delicious, but getting to watch our chef select and craft the sushi and sashimi was an incredible treat. A slight moment of panic during our sashimi course as we worried that we wouldn't get to taste everything we wanted to try (the waitress provides you with a menu of what fresh fish is available - this particular course starts as omakase, but then you are welcome to add on from the menu) - and we sampled our way through nearly all of the day's offerings. Hokkaido uni, orange clam, a sub-specialized cut of toro... truly perfectly seasoned rice... it was amazing.
Perhaps the closest sushi/sashimi experience I've had to eating at Tsukiji in the U.S. Added to my list of absolute must-eats when in Vegas.