The specialty of the house here is seafood from the San-in region of Western Honshu, flown in daily and served grilled and as sashimi. There's also an excellent selection of sake from the region, and a lively after-work crowd. Prices are extremely reasonable - budget around Y2500-3500 at dinnertime for food and drink.
This book will introduce you to more than twenty of Japan's favorite specialty foods that are less well known abroad, along with a guide to the best places in Tokyo to try them and expert tips on what to order. From Bento.com.