I've visited this place three times now -- once during a quiet late night evening, and twice during lunch time.
First off, the good points:
a) excellent ambiance - they do their best to decorate the insides; nice Japanese style wooden food tables and have seperate booth areas for larger parties. they have nicely decorated trees with spring blossom that fit the decor well. even the tea pots and appetizer plates were high quality pottery and heavy cast iron pieces.
b) the japanese food quality was excellent. one of my favorites is the tempura battered california rolls. the lunch boxes are your typical japanese boxes, but are reasonably priced. they have alot of speciality rolls. considering what else is in the area, its one of the best japanese places.
Now for the negatives:
a) Service is horrible when they are busy or even semi-busy during lunch hours. I've witnessed people waiting at the front for 10 or more minutes while waitresses (older moms) walked past them. In one instance, I saw a couple seated at a table -- and 15 minutes later they walked out b/c they weren't even given menus or tea. It seems like they the waitress' get easily overwhelmed during busy or even semi-busy times. At first I thought it might have been an off day, but I came back several weeks later for lunch and saw pretty much the same story.
But if its quiet, they do a pretty good job.
If you're pressed for time though, its russian roulette to what kind of service you will get.