One of Tokyo's original German restaurants, Rheingau is so old-school that the sign out front sports a seven-digit phone number. The kitchen does a decent job on Tokyo's favorite German delicacies such as sauerbraten, sausages and the occasional game meats, and the hors d'oeuvre platter is a reliable place to start.
The beer list offers the usual Tokyo imports - Erdinger, Bitburger, Schofferhofer - at below-average prices. There are even a few schnapps on offer. Budget Y4000-5000 at dinnertime; lunch from Y850.
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.