Hattendo is a sweets shop located near JR Shinagawa (as well as the Tokyo and Akihabara stations) famous for its custard cream buns. The buns make for great snacks, and are also frequently purchased as souvioneers. The cream also comes in different flavors, such as macha (green tea), ogura (red bean), and chocolate. The buns are often sold out by rushhour (18:00), so buy them early!
Own or work here?