After living in Japan for four years, I can say this is pretty authentic. The tempura ramen and miso ramen were great-missing a little something that I couldn't quite put my finger on, but really good. The ambiance is spot on; casual and comforting. We also had the gyoza which was nice and crisp and flavorful. As close to the real experience of eating hot ramen in northern Japan as you could get in Vegas, I'd say.