The ancient Japanese kitchen featured a built-in outdoor pizza oven known as a 'kamado'. These ovens were made of clay or ceramic and were used to bake a variety of bread, including flatbreads similar to pizzas. The Japanese enjoyed toppings such as seafood, vegetables, and soy sauce on their flatbreads, creating a unique and savory dish. The 'kamado' was an integral part of the Japanese kitchen, allowing them to cook their pizzas in an outdoor setting, imparting a smoky and umami flavor to the dish.