Tsunahachi; Shinjuku, Tokyo. KDX Nakano Sakaue Bldg7F, 3-30-4, Honcho, Nakano-ku, Tokyo, JAPAN Probably the best tempura restaurant in the world. The original restaurant is a little off the beaten track in Shinjuku, but well worth the visit. A visit to Tokyo is not complete if you don't eat here! All tempura freshly made right in front of you by very talented tempura chefs. One of the more modern branches is on the 13th floor of Takashimaya Times Square.