There's a Japonais I Chicago, but I've never been.  It was downstairs in my hotel so I figured I'd give it a whirl.  The food was mediocre for a sushi restaurant.  The sushi menu they had was actually pretty pathetic.  They have a full sushi bar that I sat near, with sushi chefs, but they didn't offer a wide array of sushi or hand rolls.  I suppose I could have asked to order something that was not on the menu.  The hot food looked good, but it seemed like things you could get at any other kind of Japanese restaurant or steakhouse.  The sashimi and negiri was extremely over priced compared to other sushi places in Las Vegas.  I was at Little Budda at Palms and also Sushi Roku at Caesar's and those places were 100xs better than Japonais.   I'd recommend those two over Japonais any day.  \n\nThe service was OK - I can't say it was good, but I can't say it was terrible.  I was greeted and addressed with a friendly face, but everything was just sooooo slow.  Even the host saw us waiting for a table and finished his conversation with the bartender before he came to show us to our table  The restaurant was EMPTY (maybe that has something to say about the place), and there had to be about 10 servers, but my wine glass and water glass sat empty for at least 10 minutes.  For Vegas standards, the service was pretty bad.\n\nFor a plus, I had the tuna sashimi, soft shell crab roll, and tempura roll and all were very tasty.  They gave you a ton of soft shell crab on top of the roll and the sauce was great.  \n\nI think Japonais was overrated and definitely overpriced.  Not sure if I will ever try the one in Chicago.