This is a "secret" place as many of the sake restaurants seem to be -- it is hidden in the basement of an office building. You've got to walk into an office building past the security guard, walk down the stairs (not a grand set but the kind you'd use in the event of a fire) and voila (or whatever equivalent word is in Japanese), you are met with a tranquil setting where you can sample hundreds of sake. There is a tasty menu as well but since this is a sake place, the dishes are small appetizer/tapas style that you order to share with the table. They have flights of sake if you're into experimentation. On weekend nights, it's hard to get in without a reseravation.