We tried Ninja Sushi a few weeks ago and I have to say I was very pleased with the atmosphere, the food, and the service.
My daughter and I came in on a Friday late afternoon/early evening so they were not too busy yet. We were greeted and opted to sit at the sushi bar. The sushi chefs were all so nice and eager to help us. My daughter loved watching them and they even prepared some beautiful pieces for her. She was delighted. She loves shrimp and was very pleased that there was an appitizer of popcorn shrimp on the menu. She loved it and with a bowl of rice she was a happy camper. I had a Dragon Roll which was delicious. They have an extensive menu and seemed willing to make anything to order. Having never traveled to Japan I wouldn't know if this is "authentic" versus "americanized". I frequented several sushi spots in Northern California and this is on par with those I've tried before.
The service was very pleasant and we were checked on several times to make sure everything was to our liking. I also enjoyed the atmosphere. There are several booths and a nice bar along with the sushi bar. It's decorated in dark colors with a cozy feeling. The only thing I thought awkward was the space, or lack of, right when you walk in the door. The register in there and then it seems as though you are right on top of the tables. I would imagine this would be a problem if they were very busy. There seemed to be no waiting area.
I am pleased to have a good sushi spot close to home and we will return! They also run lunch specials so I will be trying them for lunch soon.