The 5 top things I got to say about this place:
#1 The food's great for when you're sober and when you're...not sober!
#2 Perfect end-of-the-night destination.
#3 Check out their sake menu (nigori is always good).
#4 There may be a wait...but that's a good thing!
#5 Not for you if you have an overly discerning palate for sushi or ramen, don't hate.
I've lived in Vegas for years, but only found this place in the last year or so, definitely my loss. I tend to either start the night here before venturing out to the strip to party or end a good night out with friends with a good atmosphere and delicious food.
This place is a good fit for both those less familiar with Asian dining (a good dose of something new) and those more than used to Asian restaurants. No matter who you are, get the beef tongue!
One last note is to keep you head up (there's tons more to order all over the walls) and talk to people! It's an open and friendly environment, if you see your neighbor eating something that looks good, POLITELY lean over and ask what it is.