A really interesting concept for a restaurant but the roast beef is a bit dry. The rice is shaped as a cone then slowly wrapped with slices of roast beef and before the top is covered, an egg is put on top before wrapped again in roast beef. Then a sauce was put on top and around the plate. Then you slowly unwrapped the beef while you eat. There are different kinds of «volcano» you can choose from. Prices start from 850 yen.