We’re confident calling Tsukiji Sushiko Nagomi the best sushi restaurant at Tokyo Station, and after tasting your way through their 14-nigiri omakase set you're bound to agree. The seafood is brought in fresh from Toyosu Market every morning, and it shows – especially in the tuna selection, which ticks all the various boxes of fat (otoro, chutoro and so on) while placing particular emphasis on lean, mouthwateringly smooth akami. A full selection of tuna cuts, including relative rarities like tail, cheek, collar and noten (forehead), can be sampled for dinner.
Besides nigiri sets, the lunch menu features a number of kaisendon (bowls of rice topped with sashimi) and chirashi (sashimi trimmings, egg slivers, vegetables and nori over rice), plus Nagoya-style hitsumabushi, or grilled eel served with rice, veg condiments and green tea. Those catching an early train can power up with a traditional Japanese breakfast (¥770) consisting of rice, miso soup and pickles as well as a main dish of your choice, available here from 7am daily.
There’s plenty of seating inside the restaurant, but if you’re short on time, consider ordering and eating at the standing-only counter next to the main entrance.