Tamai Nihonbashi Main Branch is a restaurant in Nihonbashi, Tokyo that serves conger eel rice bowls and eel egg rolls. From the middle box size up, diners can choose half steamed eel and half grilled eel, and pour broth made from eel bones over it to eat as ochazuke. It opens at 11 a.m., accepts orders while waiting, and has a Korean menu. Without a reservation, the wait can run 20 to 40 minutes.