Oyster Bar Jackpot Marunouchi is an oyster restaurant in the basement of Marubiru, a five-minute walk from the Tokyo Station underground passage. It serves raw oysters brought in from regions across Japan and overseas, which can be compared by origin, along with grilled, steamed, and fried oysters. A raw oyster promotion runs until 19:00, and staff explain the differences in origin and taste so you can choose a size and flavor that suit you. There are not many seats, so table seats fill up quickly and a reservation is safer.