Cafes with scenic settings are a rarity in Tokyo, so this lovely spot looking out over the rowboats on the moat is worth a stop if you're in the neighborhood. After 5pm it's a proper restaurant, with surprisingly good upper-level Italian fare, including a nice assortment of small appetizers and lots of good-value wines. Budget around Y6000-9000 for dinner. There's also a separate self-service section of the cafe next to the boat docks; they're open for coffee a little later in the evening.
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.