Before Uchi, Japonais was my favorite sushi restaurant. Still remains on my list of places to eat in Chicago and Vegas. Even with all the other amazing restaurants in Vegas, I still save one night for Japonais. And so worth it.
It's in the Mirage and it's not the hip, happening place to be. But I don't care. The food is good. Service is good.
Highly recommend the spicy mono, bin cho, and half aji. Get the mackeral bones fried after you're done with the sashimi and it is AMAZING.
Leave happy.