First of all, I have to say my only reason for giving a 4-star rating is because I haven't been to many other authentic izakaya style restaurants in Vegas so I don't have many to compare it to.  However, I'm a huge fan of sushi and have had a few very authentic home-cooked Japanese meals, and based on what I know from these experiences, Kyara was a pleasant surprise!  It's so unfortunate that it has gotten a few poor reviews so early because they really almost kept us from checking it out.  The bottom line is, the food was great, the atmosphere was clean and comfortable, and the price-point is great!  Do yourself a favor a give Kyara a try.  Personally I can't wait to go back for more!