Aged sushi prepared with originality and passion. Yutaka Isayama ages fish to bring out aroma, tenderness and flavour, favouring dry-ageing to impart a certain wildness of taste. Snacks are interspersed so as not to jade the palate with a succession of intensely flavoured sushi toppings. Aged sushi pairs well with sake, so ask the proprietress, an accomplished sake sommelier, for suggestions.