This eel restaurant is located on the first basement floor of Tokyo Station in Kurohiki Yokocho. "Eel Yondaime Kikukawa" operates an eel wholesaler founded in Showa 7. An accurate vision backed by history and an insistence on ingredients. "Ippon Una" implements the Japanese food culture that has been passed down since its establishment to "deliver the original appearance", and the chef's skills can be seen in the "open kitchen". The famous specialty "Ippon eel" is carefully selected from the best quality and grilled directly. Crispy skin, thick meat in the middle, and condensed eel fat flavor. Be sure to try the luxurious flavor of eating the eel whole.