Kachi Sushi
This restaurant is usually quite empty, but the sushi is good. Inspired me to make my own sushi at home. It's a bit pricy, like most sushi restaurants, but this one is worth the price.
They have a smoking and non-smoking area.
Nice place for a bit more fancy lunch or dinner, but if you are hungry, you better go to Shabu Slim on the ground floor, which is an all-you-can-eat shabu-shabu coveyer-type of restaurant (which also has sushi).

