The fish is fresh and service is excellent. There is a good selection of cold sakes. The menu is the traditional Japanese fare, with not too much selection. However, they are very accommodating, making us dishes that were not on the menu. We ordered a kampachi kama (not on menu) and it was very well done.
Even though outside the restaurant is somewhat seedy, the outside is still well lit and we didn't feel uneasy. The inside is simply yet elegantly decorated, "zen" indeed.