Sungari is a long-running Russian landmark, and the main branch across the street from Seibu Shinjuku Station has been serving up caviar, Russian delicacies and vodka for several decades now. This second branch occupies more modern quarters (they moved from Nishi-Shinjuku in 2019), but offers roughly the same menu, along with various Russian beers. Budget around Y4000 at dinnertime, with numerous prix-fixe menus available. Lunch ranges from Y1000-3500.
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.