Arrived Vegas and checked into hotel with the family (wife and 2 kids, 5 & 7) after 10 so there wasn't much of a choice. Yelped "ramen" and this place was one of the top choices, plus it closes at 1 am and is not far from Embassy Suites Convention Center. The location is in a small L shapped strip mall kitty corner from CVS Pharmacy.
Service was friendly and reasonably fast. We ordered two pork stock ramen (king size), tempora odon, and agidashi tofu (fried tofu). The kids split one of the ramen, but turned out they like the odon more. King size is suppose to be regular sized and queen is small, according to the wait staff. Wrong! King size turned out to be huge. I was stuffed by the pork ramen.
Over all, I'm impressed and would have given this place a 4 star for open till late and a solid authentic ramen. The miss was the location of the booth with was too close to the bar where a few late night patrons and the bar tender and wait staff were rather too loud. And there were no kimchi on the table, which I thought was a standard for ramen shop. But i think this place is not technically a ramen shop. I wanted an order of uni sushi and was told they didn't have it. Too bad... I love uni.
Oh the agidashi tofu i thought was execellent.
With so many ramen choices in town I think i would like to try others before coming back to this one. Ichiza's open till 3 am according to yelp; but it is on the west side of I-15.