This Japanese restaurant is located in a unique setting: a reproduction of a World War II bunker in Barrio de las Letras. It is a restaurant specializing in Japanese food led by the chef Julián Mármol where he uses only the best ingredients to make traditional Japanese dishes that have managed to seduce the Michelin Guide critics into giving him a star in their 2019 edition, which has been renewed in 2023.

The establishment is divided into two floors: the upper area, which boasts exclusive décor, transports diners to a traditional Japanese Izakaya tavern; and the lower floor, which is a  perfect recreation of a World War II Japanese bunker, and is also used to host corporate and private events. 

The restaurant offers two tasting menus: Clásicos del bunker, a unique opportunity to enjoy some of its most celebrated dishes, and Evolution, a menu full of novelties that reflects its evolution in the understanding of each product in all its depth, always accompanied by the finest selection of sakes, wines, and champagnes on the market.