Saku Sushi is a solid choice for Japanese food though it can be a bit pricier than their competitors.
Of the handful of Japanese restaurants I've been to downtown I think Saku Sushi is one of the better places. The food quality was quite good and the service was friendly though a little slow.
We got the chefs special sushi which consisted of 12 pieces of assorted sushi for $24. The fish was fresh there was a nice selection of fish. The chicken karage was also very very good! Crispy on the outside and impossibly juicy on the inside. I highly recommend getting chicken karage (maybe to share since it was quite large).
Some other items we ordered at the table include seafood nabeyaki udon, takoyaki, chicken teriyaki, and cheesecake. The only complaint we had was that the chicken teriyaki was quite dry. It was a large portion but over-cooked. Everything else was very good.
Overall I enjoyed my meal and I feel the quality is better than most other Japanese places in the area.