I have been to Umiya... probably about 10 times, sometimes even twice a week. For someone like my sister and I who work til 10 or 11pm, a spot that opens late into the night is perfect and apparently it's hard to find in a 24 hour city like this one.
I like Umiya for one thing and one thing only: their sushi and quality of fish. Most of the rolls that I've tried are pretty damn good. (Salmon killer; orange blossom, and although this roll was my absolute all time favorite, they must have tweaked something because it just doesn't taste the same; snow white; rattlesnake) The nigiri is composed well in terms of the ratio of rice to fish. The quality of their ingredients are fresh--with the exception of avocados perhaps being too fresh since it was nearing raw in my Monkey Brain. Oh man, with an abundance of ginger flowing with my nigiri and rolls, I'm a girl in heaven after a long day at work!
The only thing that holds me back from a 5 star rating is the service. To pick on the nitty gritty stuff, even though the servers know my sister and I their greeting is always the same. (I work in the service industry as a waitress and I can't say that I'm the best in my field but 8 out of 10 customers complement me on my service and I can say with confidence that 100% of the returning customers like to be recognized.) Whether they are busy or not, they rarely check up on my table and we always have to ask for attention. Even when they drop off our orders they never seem to ask if everything is alright and if we need something. I hope that they realize quickly that service is just as important as food for a business and regroup the way they serve customers.
Other than the service, a must try sushi joint! :)